between the syntax

What is the problem with my syntax when between syntax get 1 row and then not between should be recover all the remaining lines.



Select * from a backup

DBNAME DETAILS BACKUP SERVER PORT
---------- ---------- ----------- ---------- ----------
test101 test1 50000 first db 29/09/2011
test101 test2 50001 first db 29/09/2011
test101 test3 50002 first db 29/09/2011
test101 test4 50003 first db 29/09/2011
test101 test5 50004 first db 29/09/2011
test102 test exception 50005 28/09/2011
test103 test exception 50006 26/09/2011
test104 test exception2 50007 27/09/2011

8 response (s) selected.


Select * from backup_exception

THE DBNAME SERVER PORT EXCEPTION
---------- ---------- ----------- ----------
test104 test 50007 10/06/2011

1 response (s) selected.


Select backup.server, backup.backup, backup_exception.dbname and backup_exception.exception in the backup_exception of backup left outer join on backup.server = backup_exception.server and backup.dbname = backup_exception.dbname and backup.port = backup_exception.port where backup.backup < (current date - 1 day) and backup_exception. EXCEPTION, between the current Date and the backup_exception.exception

SERVER BACKUP DBNAME EXCEPTION
---------- ---------- ---------- ----------
27/09/2011 test104 test 06/10/2011

1 response (s) selected.


Select backup.server, backup.backup, backup_exception.dbname and backup_exception.exception in the backup_exception of backup left outer join on backup.server = backup_exception.server and backup.dbname = backup_exception.dbname and backup.port = backup_exception.port where backup.backup < (current date - 1 day) and backup_exception. EXCEPTION not between current Date and backup_exception.exception

SERVER BACKUP DBNAME EXCEPTION
---------- ---------- ---------- ----------

0 response (s) selected.

Published by: user587133 on October 1st, 2011 07:49

Published by: user587133 on October 1st, 2011 08:15

Comparison of NULL value is never true:

select backup.server,backup.backup,backup_exception.dbname,backup_exception.exception
from backup left outer join backup_exception
  on backup.server = backup_exception.server
 and backup.dbname = backup_exception.dbname
 and backup.port = backup_exception.port where backup.backup < (current_date - 1 )
 and (      backup_exception.EXCEPTION not between current_Date and backup_exception.exception
          or backup_exception.exception is null);

Please, look at the last two lines! When the EXCEPTION is set to zero, then the condition in your code will be false. That's why I added or backup_exception.exception is null .

Published by: hm on 01.10.2011 09:09

Tags: Database

Similar Questions

  • Difference between the syntax 3

    Hi all

    Can someone tell me the difference between the 3 syntax of using elements of the application?

    1. APP_ITEM_NAME.
    2: APP_ITEM_NAME
    3. #APP_ITEM_NAME #.

    When these 3 syntax are specifically used? Answer me.

    Thank you and best regards,
    Sunil Bhatia

    Sunil:

    Use and the bind variable substitution syntax is explained in the

    http://download.Oracle.com/docs/CD/E14373_01/AppDev.32/e11838/concept.htm#BEIEGCCC

    CITY

  • Spice up the syntax of the format rules

    Is there a document that explains the difference between the general syntax of SPICE and syntax of Multisim? I tried to read the Guide to using SPICE simulation, but the link takes me to an ad of Multisim 11. Then when I search the manual I loop back to the same place. Annoy her.

    When I import a file SPICE, I would like to know which statements will be valid. Including summaries of the study.

    Thanks in advance.

    Hello

    There is a page in the Multisim help file that highlights the difference between the syntax of Multisim SPICE and other Spice (PSPICE and XSPICE) syntaxes. To find this page, follow these steps:

    1. In Multisim, click Help > Multisim help
    2. Click the contents tab. If you use Multisim 10.1, the help topic can be found under the Multisim SPICE reference. If you use Multisim 11, the help topic are under Simulation > Multisim SPICE reference

    Generally, the study summaries are ignored by Multisim. To set your analysis, you need to click the menus available through simulation > Analyses.

    Hope that helps.

  • Examples of error performance... ? Difference between the runtime error and the syntax error?

    Hello, I know that an implicit validation occurs before a runtime error.

    What is the difference between a runtime error and the syntax error (syntax error seems pretty obvious).

    Could you give me an example or 2 an error of execution'd. Should not be explained with statements etc. just a small example of first.

    Hello, I know that an implicit validation occurs before a runtime error.

    You do? How do you know that? What is the source of your information?

    What is the difference between a runtime error and the syntax error (syntax error seems pretty obvious).

    The syntax is checked at the time of the analysis/compile. Runtime errors occur to, of course, of execution time. You can NOT run sometimes that there are syntax errors.

    Could you give me an example or 2 an error of execution'd. Should not be explained with statements etc. just a small example of first.

    Ideally, Oracle has created an entire book of them. Make your choice.

    http://docs.Oracle.com/CD/B28359_01/server.111/b28278/TOC.htm

    The doc PL/SQL treats Exceptions language and everything that you always wanted to know about them. It also includes examples

    http://docs.Oracle.com/CD/B28359_01/AppDev.111/b28370/errors.htm

  • Insert the list of access between the other 2 control numbered ACL on cisco

    Someone knows how to do this? I heard about Cisco and have actually did this once, but don't remember the syntax.

    I should be able to insert the acl 15 between the low 2.

    Expand the 198 IP access list

    10 ip allow a whole

    20 a whole ip deny

    TIA

    Router (config) #ip - extended access list 198

    Router (config-ext-nacl) #15 allow accord a

  • What is the difference between the different JOINTS?

    Specifically, and more of the syntax, what is the difference between using:

    JOIN TO...

    WE...

    and

    JOIN TO...

    WITH THE HELP OF...

    It seems that they work exactly the same, just different syntax.

    Any ideas?

    Hello

    Please read here the first https://docs.oracle.com/database/121/SQLRF/statements_10002.htm#i2080416

    "

    JOIN him JOIN keyword indicates explicitly that a join is executed. You can use this syntax to replace table used comma-separated expressions in WHERE clause joined with FROM join clause syntax.

    CONDITION use the ON clause to specify a join condition. Doing so allows you to specify join conditions separate from any search condition or filter in the WHERE article.

    USING (column) when you specify an equijoin of columns that have the same name in both tables, the USING column clause specifies the columns to use. You can use this clause only if the joining in both columns have the same name. In this clause are not eligible in the name of the column with a table name or a table alias.

    "

  • Any way to link between the projects merged on HR server?

    Hello. Me once again.

    Is it possible to maintain links between the pages of different projects merged to the HR server?

    Clarify, consider the gross example of presentation of the projects merged in HR server. Say that the authors of the projects have an agreement that project names (for example, "output of the second project") and the first ('welcome') subject will have static names. Is there a way to, for example to create a link in the Welcome th pagee first output of the project , which opens the page home of the second output of the project? If so, please suggest the correct syntax.

    Note: I found that do a right click on a navigation item, copy the link, then paste the link in the address line of the browser, then the project that contains the link opens outside the context of the environment have been merged. Only clean the project navigation is displayed.

    Thanks in advance.

    -Kurt

    RHServer_Merge_mockup.png

    Answered own question with another experience.

    As I said in the original post:

    > Note: I found that do a right click on a navigation item, copy the link, then paste the link in the address line of the browser, then the project that contains the link opens outside the context of the environment have been merged. Only clean the project navigation is displayed.

    ... If you take this copied link and use it as a the hyperlink address, instead of in the address line of the browser and navigation to him directly, just copy the link DOES not work. For example, the hyperlink works for the original query:

    http://192.168.231.128:8080/RoboHelp/Robo/Server/General/projects/second%20Project%20outpu t/also

  • Channels for the identification of the records by using the syntax for Connect By

    Hello

    Can someone help with the following problem please?

    Our database records evaluations of the child for families in difficulty. When get us in touch with them, ideallu:
    A child receives a preliminary assessment (evaluation).
    If they are deemed to have need for additional support, they are given a second assessment (B) that is triggered by the assessment and an ID of the trigger to identify what assessment he comes.
    If they are deemed to need further support, they are given a third evaluation (C) that is triggered by the 2 assessment and an ID of the trigger to show that it comes from the b. assessment
    This is also true for a fourth assessment (assessment) report that is triggered by the evaluation C.

    However, due to the poor implementation of this concept by our provider database and the lack of knowledge by the workers, we have 2 problems:

    (1) analysis has isn't always the starting point as a worker can start any assessment at any time, i.e. from c assessment.

    (2) in view of this, a child can have several evaluations of the same type, i.e. a x 3 C, 2 x B assessment assessment in no particular order.

    The problem:

    I need to identify the separate strings (desired_output) of intervention using the relationship between the registration ID and the ID of the trigger, as shown in the table below:
    CHILD_ID RECORD_ID TRIGGER_ID ASM_NAME REC_START_DATE            REC_END_DATE              DESIRED_OUTPUT         
    -------- --------- ---------- -------- ------------------------- ------------------------- ---------------------- 
    A00001   R297931              B        18-JUN-10                 18-JUN-10                 1                      
    A00001   R299381   R297931    C        23-JUN-08                 23-JUN-08                 1                      
    A00001   R133219              A        12-AUG-08                 12-AUG-08                 2                      
    A00001   R240118              A        30-OCT-09                 30-OCT-09                 3                      
    A00001   R604913              A        17-AUG-12                 17-AUG-12                 4                      
    A00001   R604943   R604913    B        17-AUG-12                 17-AUG-12                 4                      
    A00001   R604961   R604943    C        17-AUG-12                 03-SEP-12                 4                      
    A00001   R605195              B        25-AUG-12                 25-AUG-12                 5                      
    A00001   R605214              A        28-AUG-12                 28-AUG-12                 6                      
    A00001   R609999   R604961    D        03-SEP-12                 05-SEP-12                 4                     
     
    Data:
    select * from
    (select * from
     
    (select 'A00001' as child_id, 'R297931' as record_id, null  as trigger_id, 'B' as asm_name, to_date('18-06-2010','dd/mm/yyyy') as rec_start_date, to_date('18-06-2010','dd/mm/yyyy') as rec_end_date, 1 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R299381' as record_id, 'R297931' as trigger_id, 'C' as asm_name, to_date('23-06-2008','dd/mm/yyyy') as rec_start_date, to_date('23-06-2008','dd/mm/yyyy') as rec_end_date, 1 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R133219' as record_id, null as trigger_id, 'A' as asm_name, to_date('12-08-2008','dd/mm/yyyy') as rec_start_date, to_date('12-08-2008','dd/mm/yyyy') as rec_end_date, 2 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R240118' as record_id, null as trigger_id, 'A' as asm_name, to_date('30-10-2009','dd/mm/yyyy') as rec_start_date, to_date('30-10-2009','dd/mm/yyyy') as rec_end_date, 3 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R604913' as record_id, null as trigger_id, 'A' as asm_name, to_date('17-08-2012','dd/mm/yyyy') as rec_start_date, to_date('17-08-2012','dd/mm/yyyy') as rec_end_date, 4 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R604943' as record_id, 'R604913' as trigger_id, 'B' as asm_name, to_date('17-08-2012','dd/mm/yyyy') as rec_start_date, to_date('17-08-2012','dd/mm/yyyy') as rec_end_date, 4 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R604961' as record_id, 'R604943' as trigger_id, 'C' as asm_name, to_date('17-08-2012','dd/mm/yyyy') as rec_start_date, to_date('03-09-2012','dd/mm/yyyy') as rec_end_date, 4 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R605195' as record_id, null as trigger_id, 'B' as asm_name, to_date('25-08-2012','dd/mm/yyyy') as rec_start_date, to_date('25-08-2012','dd/mm/yyyy') as rec_end_date, 5 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R605214' as record_id, null as trigger_id, 'A' as asm_name, to_date('28-08-2012','dd/mm/yyyy') as rec_start_date, to_date('28-08-2012','dd/mm/yyyy') as rec_end_date, 6 as desired_output from dual) union all
    (select 'A00001' as child_id, 'R609999' as record_id, 'R604961' as trigger_id, 'D' as asm_name, to_date('03-09-2012','dd/mm/yyyy') as rec_start_date, to_date('05-09-2012','dd/mm/yyyy') as rec_end_date, 4 as desired_output from dual)) child_records
    Originally, I thought to use Oracle Connect By syntax, but it does not (as far as I can work on!) because I have no start condition (the string of assessments can start A or B or C or D) which leads to duplication of lines.

    I thought I could use connect_by_root to group common assessments, but I am not convinced that this will give consistent results.

    -------------------------
    select
    child_records.*, 
    connect_by_root(nvl(trigger_id,record_id)) chain_id
    from child_records
    connect by trigger_id = prior record_id
    --------------------

    Is an alternative, possibly using trigger_id = above lag(record_id,1,null) (child_id order partition of...) but the assessments are in no particular order, I don't think I can specify a command clause...?

    Can anyone help to generate the desired output please?

    Thank you

    TP

    Hello

    Little Penguin says:
    ... However, due to the poor implementation of this concept by our provider database and the lack of knowledge by the workers, we have 2 problems:

    (1) analysis has isn't always the starting point as a worker can start any assessment at any time, i.e. from c assessment.

    (2) in view of this, a child can have several evaluations of the same type, i.e. a x 3 C, 2 x B assessment assessment in no particular order.

    This isn't necessarily a bad design. If it really fits your business rules is another matter. But as a means to represent events from cause to effect, to be used to CONNECT BY queries, it makes sense.

    The problem:

    I need to identify the separate strings (desired_output) of intervention using the relationship between the registration ID and the ID of the trigger, as shown in the table below:

    Let me assure you that I understand. You don't really have an desired_output column; you will need to that derived from other columns. Right?

    CHILD_ID RECORD_ID TRIGGER_ID ASM_NAME REC_START_DATE            REC_END_DATE              DESIRED_OUTPUT
    -------- --------- ---------- -------- ------------------------- ------------------------- ----------------------
    A00001   R297931              B        18-JUN-10                 18-JUN-10                 1
    A00001   R299381   R297931    C        23-JUN-08                 23-JUN-08                 1
    A00001   R133219              A        12-AUG-08                 12-AUG-08                 2
    A00001   R240118              A        30-OCT-09                 30-OCT-09                 3
    A00001   R604913              A        17-AUG-12                 17-AUG-12                 4
    A00001   R604943   R604913    B        17-AUG-12                 17-AUG-12                 4
    A00001   R604961   R604943    C        17-AUG-12                 03-SEP-12                 4
    A00001   R605195              B        25-AUG-12                 25-AUG-12                 5
    A00001   R605214              A        28-AUG-12                 28-AUG-12                 6
    A00001   R609999   R604961    D        03-SEP-12                 05-SEP-12                 4                     
    

    Data:...

    Thanks for the display of the data of the sample; that really helps.

    Originally, I thought to use Oracle Connect By syntax, but it does not (as far as I can work on!) because I have no start condition (the string of assessments can start A or B or C or D) which leads to duplication of lines.

    Is not

    START WITH  trigger_id  IS NULL
    

    identify a starting point? If something has not been triggered by something else, it is not a starting point? It is actually quite common in the hierarchical tables.

    I thought I could use connect_by_root to group common assessments, but I am not convinced that this will give consistent results.

    I'm not sure that you understand the problem. What do you mean by "consistent results? The doubt that you are worried, what exactly?

    -------------------------

    select
    child_records.*,
    connect_by_root(nvl(trigger_id,record_id)) chain_id
    from child_records
    connect by trigger_id = prior record_id
    

    You got right. If I understand what you mean by consistent results, it will bring them. You want to START to condition, of course, and as the starting lines will never have a trigger_id, there is no need to tell

    CONNECT_BY_ROOT  NVL (trigger_id, record_id)   AS chain_id
    

    You can simply say

    CONNECT_BY_ROOT  record_id   AS chain_id
    

    This will be particularly well idnetify the strings of their record_ids. Looks like you want to assign new sequence numbers (1, 2, 3,...) to identify the channels. Which takes an extra step.

    --------------------

    Is an alternative, possibly using trigger_id = above lag(record_id,1,null) (child_id order partition of...) but the assessments are in no particular order, I don't think I can specify a command clause...?

    Right; LAG depends on the order and order tells us nothing to this problem.
    In fact, feeds means so little to this problem that an event can come before the event that triggered it.
    For example, if I understand the first two lines of your output

    CHILD_ID RECORD_ID TRIGGER_ID ASM_NAME REC_START_DATE            REC_END_DATE              DESIRED_OUTPUT
    -------- --------- ---------- -------- ------------------------- ------------------------- ----------------------
    A00001   R297931              B        18-JUN-10                 18-JUN-10                 1
    A00001   R299381   R297931    C        23-JUN-08                 23-JUN-08                 1                      
    

    C event was triggered by the event B, even if C took place two years before B.
    (Not that it is important for the SQL problem, but can you explain the logic of how events can come before or after the events that triggered them?) "I'm just curious.)

    Here's a way you can assign sequential numbers to identify the channels:

    WITH     got_d_num     AS
    (
         SELECT     c.*
         ,     ROW_NUMBER () OVER ( PARTITION BY  child_id     -- Just guessing
                                   ORDER BY          NVL2 ( trigger_id
                                                  , 2     -- rows with trigger_ids come 2nd
                                       , 1     -- rows without come 1st
                                       )
                             ,             rec_start_date
                             ,             asm_name
                           )      AS d_num
         FROM    child_records  c
    )
    SELECT     child_id, record_id, trigger_id, asm_name, rec_start_date, rec_end_date
    ,     desired_output               -- if needed
    ,     CONNECT_BY_ROOT d_num     AS chain_num
    FROM     got_d_num
    START WITH     trigger_id     IS NULL
    CONNECT BY     trigger_id     = PRIOR record_id
    ORDER BY  child_id
    ,            rec_start_date
    ,       asm_name
    ;
    

    Output:

    `                                              DESIRED
    CHILD_ RECORD_ TRIGGER A REC_START REC_END_D   _OUTPUT  CHAIN_NUM
    ------ ------- ------- - --------- --------- --------- ----------
    A00001 R299381 R297931 C 23-JUN-08 23-JUN-08         1          3
    A00001 R133219         A 12-AUG-08 12-AUG-08         2          1
    A00001 R240118         A 30-OCT-09 30-OCT-09         3          2
    A00001 R297931         B 18-JUN-10 18-JUN-10         1          3
    A00001 R604913         A 17-AUG-12 17-AUG-12         4          4
    A00001 R604943 R604913 B 17-AUG-12 17-AUG-12         4          4
    A00001 R604961 R604943 C 17-AUG-12 03-SEP-12         4          4
    A00001 R605195         B 25-AUG-12 25-AUG-12         5          5
    A00001 R605214         A 28-AUG-12 28-AUG-12         6          6
    A00001 R609999 R604961 D 03-SEP-12 05-SEP-12         4          4
    

    This example uses rec_start to affect chain_num and also sort the output, but not to determine wht in a string. The first 3 events untrigered (in rec_start order) have been in August 2008, October 2009 and June 2010, while they were assigned chain_nums 1, 2 and 3, in that order. Antyhting that was triggered by them, directly or indirectly, gets the same chain_num if it happened before or after the starting point of the chain. Thus, the first line of the output, in June 2008, gets chain_num = 3. You have assigned desired_output = 1 on this line. If you can explain how you got the number 1, we can probably find a way to code, so that the calculated chain_num is identical to desired_num. In the above query, they are not the same, but they are related. Everywhere you specified desired_output = 1, the above query produces chain_num = 3. If the numbers are the same (for example desired_output = 4 = chain_num) it's just a coincidence.

    Note that when I used ROW_NUMBER, I did in a subquery, not in the main query where the CONNECT BY were made. Never use the analytical functions (for example, ROW_NUMBER) in the same query with CONNECT BY. The analytical functions are often the cause CONNECT BY conditions to be incorrectly evuated. I have never seen any literature on this subject and it doesn't always happen, but I suggest that you avoid to mix everything well.

    Published by: Frank Kulash, Sep 15, 2012 10:00

    Published by: Frank Kulash, Sep 15, 2012 10:44

    I just read the answer from John, who has a nice illustration of my last point: use of the separate petitions for both analytical and CONNECT BY. You can use the analytic function first, and then CONNECT BY, as I did, or you can do the first CONNECT BY and then use the analytic function (in a solution of John DENSE_RANK) later. Whatever it is, you must separate them.

  • How to change the syntax highlights in Dw CS6

    Hey guys,.

    I was looking through the forum and Mr Google, but couldn't find anything. So instead of wasting time, I might find someone here who has already done it.

    As in the title of the topic, I want to clarify some phrases of syntax or logic structure with different colors. At the moment all the html in Dw looks great, and there is little visual difference between the tags, properties, values, and content.

    Can someone tell me please in the right direction?

    Thanks in advance!

    Check if the help below document is useful to you.

    http://help.Adobe.com/en_US/Dreamweaver/CS/using/WSc78c5058ca073340dcda9110b1f693f21-7be0a .html

    See also this thread that might help.

    http://forums.Adobe.com/message/2926213

    If this is not what you are looking for then maybe you can post the screenshot showing your query...

  • What is the difference between the 2 procedures pls. ?

    What is the difference between the 2 procedures in syntax and bussiness pls.

    CREATE OR REPLACE PROCEDURE Balance_quantity_update
        (V_STORE_ID IN NUMBER,  V_ITEM_SERIAL IN NUMBER) IS
      BEGIN
      UPDATE WH_T_ITEMS A
          SET BALANCE_QTY = ITEM_QTY
          WHERE STORE_ID = V_STORE_ID
          AND ITEM_SERIAL = V_ITEM_SERIAL
          AND ITEM_QTY = (SELECT MAX(ITEM_QTY)
                          FROM WH_T_ITEMS B
                          WHERE A.STORE_ID = B.STORE_ID
                         AND A.ITEM_SERIAL = B.ITEM_SERIAL);
       END;
       /
    CREATE OR REPLACE PROCEDURE Balance_quantity_update
        (V_STORE_ID IN NUMBER,  V_ITEM_SERIAL IN NUMBER) IS
      BEGIN
      UPDATE WH_T_ITEMS A
          SET BALANCE_QTY =MAX(ITEM_QTY)
          WHERE STORE_ID = V_STORE_ID
          AND ITEM_SERIAL = V_ITEM_SERIAL   ;
       END;
       /
    Kind regards

    Abdetu...

    I don't know exactly what you're asking. The query

    UPDATE WH_T_ITEMS A
       SET BALANCE_QTY =MAX(ITEM_QTY)
     WHERE STORE_ID = V_STORE_ID
       AND ITEM_SERIAL = V_ITEM_SERIAL   ;
    

    is not valid SQL from Oracle. As MAX aggregate functions cannot be used in a query like that because Oracle has no idea what you aggregate by. There is nothing preventing Oracle to change the syntax of the SQL language to allow an aggregate be used this way, but there is usually no reason to extend the SQL language like that.

    You can assign the result of a query that included a total of BALANCE_QTY column, i.e.

    UPDATE WH_T_ITEMS A
       SET BALANCE_QTY = (SELECT MAX(ITEM_QTY) FROM <> WHERE <>)
     WHERE STORE_ID = V_STORE_ID
       AND ITEM_SERIAL = V_ITEM_SERIAL   ;
    

    I think I mentioned in some of your previous discussions, a data model where you have a table of ELEMENTS that has an ITEM_QTY and the BALANCE_QTY looks suspicious. You assign the value of the ITEM_QTY column to the BALANCE_QTY on the same line does only increase anxiety.

    Justin

  • the different between the default constructors and complete this builders

    I have in my grain I have two constractors
    public Person() {}
    }

    public person (String id, String firstName, String lastName) {}
    This.ID = id;
    this.firstName = firstName;
    this.lastName = lastName;
    }
    in servlet I test the following, they do the same job, so what's the difference between these two constractors?
    Person person = new Person (id, firstName, lastName);
    Person person = new Person();
    person.setId (id);
    person.setFirstName (firstName);
    person.setLastName (lastName);


    If the daughter class extends the class parent, if I need to use great I can use the default constructors?

    A few notes to clarify the terminology first.

    I have in my grain I have two constractors

    Initially, I planned to ignore this harmless typo, but since you have repeated, we will the work point and move it ouf of the path: it's + constr.uctor +.

    the different between the default constructors and complete this builders

    There is no such thing as a "full" constructor There are builders, and a single class may have several of them, which are differentiated by their argument list.
    I assume you mean by "complete Builder" "constructor with arguments" (I dunno what is the official term for this, I'll try to find it in the specs, but that's a detail).

    Also note that the notion of "default constructor" is different from what you think:
    Citing the [url http://java.sun.com/docs/books/jls/third_edition/html/classes.html#16823] JLS:

    If a class contains no statement of constructor, a constructor that takes no default setting is automatically provided:
    (...) the default constructor takes no parameters and simply calls the constructor of the superclass without arguments.

    In your case (given the code provided), you mean "an explicitly declared constructor, which takes no arguments.

    the different between the default constructors and complete this builders

    In addition, there is no such thing as a manufacturer 'this '.
    There are builders, who are declared (or by default), and there is This syntax, which allows to invoke a constructor.
    Typical example:

    public class Price {
        /**
         * Creates a new price, with the specified amount and in the specified currency.
        */
        public Price(int amount, String currency) {
            this.amount = amount;
            this.currency = currency;
        }
    
        /**
         * Creates a new price, with the specified amount and in the default currency (US $).
        */
        public Price(int amount) {
            this (amount, "USD");
        }
    
        /**
         * Creates a new price, with a zero amount and in the default currency (US $).
        */
        public Price() {
            this(0);
        }
    }
    

    * If the daughter class extends the class parent, if I need to use great I can use the default constructors?

    If your question is "I can invoke any superclass constructor, including the default?", then the answer is almost Yes (it's 'Yes, you can call a constructor that is visible to the subclass' - visibility here is in terms of public/protected/package ).

    Example:

    public class Mafioso extends Person {
        public Mafioso(String firstName, String lastName) {
            super(firstName, "The Silencer"); // Mafiosi usually don't like being known by their actual last name
        }
    
        public Mafioso() {
            super();
        }
    }
    

    Note that you can call the constructor of the superclass No. - arg (see super() invocation above), as soon as such a no. - arg constructor exists and is visible, no matter if you explicitly declared, as in your person class, or is this a compiler-generated default constructor.

    I hope this helps. Kind regards

    J.

  • Differences in time between the start date and end Date

    I have a requirement to get the difference between the two dates, I am on the syntax below to fill, but it does not work. The syntax is the following:
    TimestampDiff (SQL_TSI_MONTH, "[< dStart_Date_ITAG >]", '[< dEnd_Date_ITAG >]'). Could you please help me on this. Thanks in advance

    Olivier

    Hello Roytson,

    I want to enjoy the sytem itself, I mean there are 2 custom fields start date and enddate, my function should take system only do not enter manually.
    could you please develop this thing.

  • Need help with the syntax for default message.

    I want to display by default in the layout of lead for Feild "owner of lands":

    IIf (< plRegion_ITAG > = "South", "SG",
    IIf (< plRegion_ITAG > = "North", "AT",
    IIf (< plRegion_ITAG > = "East", "GK",
    IIf (< plRegion_ITAG > = "West" "BM", "Other than thesis it should be NULL")))

    ("Other than these we NULL"-> to do this, I tried a different name)

    SG, THE, BM, GK (little) are my managers society of sales/Terriotory.
    I did not miss anything, the above syntax doesnot work for me.

    Thanks in advance.

    Kind regards
    Ratan N

    Hi Ratan,

    A few notes:
    (A) you are missing a comma between "West" and "BM".
    (B) you must use "and not"
    (C) I'm not sure that you can have a drop down list remain NULL by using the IIf function. Even if you can it won't probably work with "other than these, it must be NULL.
    (D) I suggest that you actually add a value called NULL for the list of choices and after writing the syntax you can disable it to prevent your users from accidentally choose it.
    (E) should look like this:

    IIf (= 'South', 'SG',
    IIf (= 'North', 'AT',
    IIf (= 'Is', 'GK',
    IIf (= 'West', 'NULL', 'WB')))

  • Four fingers sliding between the desktops?

    What happened to the ability of sweeping four fingers between desktop computers (Sierra)?  Is it gone or just hidden somewhere?  I looked in the trackpad system preferences and I see is the ability to scan to four fingers between apps fullscreen.  I used four-finger drag to move between desktops countless times every day, I hope that this feature did not go away or I'll be a frustrated Mac head.  If it disappeared (shouldn't be), how the hell move us between workstations?

    OK, I stumbled accidentally on a solution.  I have reset my desktop image and four fingers sliding between the offices came back.  Phew!

  • I was wondering what the difference was between the powerbeats 2 and the powerbeats 3. What is this new "chip" in the powerbeats 3?

    I was wondering what the difference was between the powerbeats 2 and the powerbeats 3. What is this new "chip" in the powerbeats 3?

    Hello

    Main differences are:

    • Up to 12 hours of battery life with Powerbeats3, which use chips to W1 Apple energy-efficient (vs. up to 6 hours of battery life with Powerbeats2).
    • A quick charge of 5 minutes for a typical use of an hour (vs 15 minutes to load).
    • Improved ergonomic design.

    More information:

    http://www.Apple.com/shop/product/MNN02LL/A/powerbeats3-wireless-earphones-shock-Jaune

    http://www.beatsbydre.com/earphones/browse-earphones/wireless-earphones/ML8V2.ht ml

Maybe you are looking for

  • I bought a used ipad. However, it seems that it is still connected to the old user account.

    Hello I bought a slightly used iPad delivered in my city; Kumasi-Ghana. However, it seems that it is still connected to the old user account. I couldn't so do my set up. Can you help me? The model is with DM * KYH A1475 as serial number. The FC ID is

  • How to disable voice command?

    I have an iPhone 6s more working 9.2.1. For her, I connect (via the audio port) a wired headset with a built-in microphone. Whenever I connect the two, voice control turns on automatically, and then iTunes automatically starts to play a song at rando

  • Photos from phone to mac without cable transfer

    I have an iphone 5 s.  iOs version 7.0.4. I can't update the iOs because I have too little storage left on my iphone So I want to take off photos and store them on an external hard drive. I have not a good faith of apple cable to connect the phone to

  • After the removal of Windows 10, why do I see Mac HD and Bootcam

    I deleted Windows 10 of my MacBook Pro (version 2009). Now, why do I see two disk: 60 GB Bootcamp and Macintosh HD 99 GB? I expected to see only o

  • Automated Windows Update

    Windows Automated Update has successfully downloaded the update (KB974417).  And apparently, it is applied correctly (I never receive error messages), but it will never clear.  The shield is constantly displayed in the toolbar to warn me that I have