Similar Questions

• Key preserved table removal: need help.

  Note When I followed the example of oradoc (in bold large print below):

  DELETE the instructions

  You can delete a view in join provided there is one and the same table in the join key. The key-preserved table can be repeated in the FROM article.

  The following DELETE statement works on the emp_dept view:

  DELETE FROM emp_dept WHERE ename = 'SMITH';

  This DELETE declaration on the emp_dept view is legal, because it can be translated to a DELETE operation on the basis of emp table and because only the emp table is the table of key-preserved only in the join.

  In the following view, a DELETE operation is permitted, because even though there are two tables stored in the key, they are from the same table. In other words, the key-preserved table is repeated. In this case, the delete statement works on the first table of the FROM list ( e1 , in this example):

  CREATE VIEW emp_emp

  SELECT e1.ename, e2.empno, e2.deptno

  E1, e2 emp EMP

  WHERE e1.empno = e2.empno;

  I tried the above and it worked very well. Here's my version of how I tried

  CREATE VIEW emp_emp

  SELECT e1.last_name, e2.employee_id, e2.department_id

  Of e1, e2 used employees2

  WHERE e1.employee_id = e2.employee_id; / * (table employees in the HR diagram) * /.

  delete from emp_emp where employee_id between 100 and 190;

  then I tried my own and not much luck. Notice in the example I use the employees of HR diagram below table

  In any case here it is:

  CREATE VIEW Emp_test AS

  SELECT the name of e1.last_name, e1.employee_id, e2.department_id

  OF Employees2 e1, e2 Employees2

  WHERE e1.employee_id = e2.employee_id;

  delete from emp_test where employee_id = 100;

  Note there is a preserved here, my employees2 table underlying table key.

  
  

  
  

  Error: ORA-01752: cannot delete the view without exactly a key preserved table

  01752 00000 - "impossible to remove from the view without exactly one key-preserved table.

  * Cause: The deleted table had

  -No table preserved key,

  -several tables preserved key, or

  -the key preserved table was a display not merged.

  * Action: Redefine the view or remove it from the underlying base table.

  In this case, it is simply repeated and as the doc said:

  DELETE the instructions

  You can delete a view in join provided there is one and the same table in the join key. The key-preserved table can be repeated in the FROM article.

  http://docs.Oracle.com/database/121/admin/views.htm#ADMIN11782

  What Miss me in my script...? I haven't tried a few variations, no luck, I can't understand what is wrong.

  In the doc if you ctrl + f, the word 'repeat' it will find repeated preserved much easier key topics (this is the only time the word repetition is used)

  Textbooks are wrong, besides - you can delete a view in join even with several DIFFERENT tables preserved key in the view definition.

  Build a script - followed by the exit.

  create table emp2 in select * from emp;

  ALTER table emp2 add constraint e2_pk key (empno) primary;

  Select count (*) from emp2;

  create or replace view emp_emp as

  Select e1.ename, e2.empno, e2.deptno

  -of emp e1, e2 emp2

  of e1, e2 emp emp2

  where e1.empno = e2.empno

  ;

  delete from emp_emp where empno = 7900;

  delete from emp_emp where empno between 7400 and 7600;

  Select count (*) from emp;

  Select count (*) from emp2;

  -----

  Table created.

  Modified table.

  COUNT (*)

  ----------

  14

  1 selected line.

  Created view.

  1 line removal.

  3 deleted rows.

  COUNT (*)

  ----------

  14

  1 selected line.

  COUNT (*)

  ----------

  10

  1 selected line.

  The script has two options for the FROM clause and (as the manual says in fact) the FIRST table in the from clause is the one whose lines are deleted.

  I thought that I had written something on this several years ago, but if I can't find the article.

  Concerning

  Jonathan Lewis

• System tablespace allocation how oracle determines the size of the measure

  Hello
  
  It may be a silly question, but the I must request and obtain a few knowdge
  
  Assume that the allocation_type tablespace is system so how oracle determines the initial measurement and size max measure?

  Osama has provided useful links to the information you need. I'll just add with locally managed tablespace that the maximum number of spans is always unlimited even if you specify a value in the storage of declaration of establishment clause. Oracle does not take into account the value you provide and will with unlimited. I consider this unfortunate since in most cases, I know how large tables can reach and if the table extends beyond that point a developer made a mistake.

  HTH - Mark D Powell.

• key preserved table

  I try to understand the key preserved table I use following script and using the table schemas HR employee
  
  
  SQL > create table t2 in select * from hr.employees;
  SQL > create table t4 in select * from hr.employees;
  
  Table created.
  
  SQL > create view v2 as
  2 Select a.first_name, b.last_name
  t4 3 a, t2 b
  4 where a.employee_id = b.employee_id;
  
  Created view.
  
  
  now isn't this view key preserved as I use the primary key of these tables in the join I thought there would be one in a relationship
  
  
  now when I do this
  
  SQL > update v2
  2 set name = 'vinod '.
  3 where name = 'Feeney;
  Set name = 'vinod '.
  *
  ERROR on line 2:
  ORA-01779: cannot modify a column that is mapped to a table not preserved key
  
  can you please tell me why I get this error

  create table as select... does not inherit the primary key.
  The t2 and t4 is not a primary key.
  This is why you are getting the error.

  ----------
  Sybrand Bakker
  Senior Oracle DBA

• How to determine if DBMS_STATS or ANALYZE TABLE used

  Dear all,
  Please please describe how to determine if DBMS_STATS or ANALYZE TABLE has been used on an Oracle 10 g 2 server.
  Thank you!

  Try looking at GLOBAL_STATS in user/all/dba_tables.
  When I ANALYSIS it shows up under the No.
  When I dbms_stats.gather_table_stats, it appears that YES.
  You could probably invoke dbms_stats.gather_table_stats with good arguments to get a number in the overall stats, but this technique can be good enough for you.

• ORA-01445: cannot select ROWID, or sample, a view of join without key - preserved table form w/report and LOV

  I create a page "Form on a Table with Report" (APEX 5). Table I has 3 columns: cat_key, item_value, item_description. The cat_key is a foreign key in a table with columns cat_key, cat_value. I created the report and everything works fine.  The page of the report shows my domain cat_key in number, so I want it instead to display the cat_value. I change the field cat_key to a text based on LOV, select my LOV and now when I view the page of report I get the "'ORA-01445: cannot select ROWID from where sample, a join without key preserved table view ' error." The report uses the ROWID as a link to the edit page field.

  If I use the same tables and even shared LOV in a report page interactive, it works fine.

  What I am doing wrong?

  This is a limitation of the IR Apex will rewrite your query to a query that includes the lookup table and the columns. So now you have actually created a query on an inline view, which causes the error. You can see the query apex created when running in debug mode. APEX will join the table of choice with your primary table. For example from one of my IR:

  Select 'ID '...

  "MSL". "" HIS_COUNTRIES "=> my primary table

  ) ) b,

  (select rv_meaning d, rv_low_value r

  of msl_ref_codes_table

  where rv_domain = "JOHN".

  ) L1 = > query My LOV Lookup
  

  ...

  So, if possible, base your reports and forms on the real primary key, no rowid.

  You can also write the IR query with the search yourself:

  Select T1.rowid...

  of primary_table T1

  look_table L1

  ...

• How to determine what product key is related to computer?

  Hi guys, I have 2 computers with Windows Vista Ultimate, I re-install and reactivate windows on 1 computer, given that the card mother. out crapped. I don't tie not so how can I know which key fits which computer on the product keys from computers? Thank you

  http://www.Belarc.com/free_download.html

  http://www.magicaljellybean.com/KeyFinder/

  If your Vista operating system is still active and running, use one of the programs above to find your product key on the other.

  See you soon.

  Mick Murphy - Microsoft partner

• How to determine if ASA is blocking port or not?

  Hello world

  I support the ASA according to the customer. I'm new to the world of the SAA.

  Users especially to check whether or not ASA allows specfic port.

  I don't know how I can check that.

  Is it possible that I can determine if ASA is blocking port or not?

  If ASA is blocking port what steps I must take to allow ASA allow specific port?

  concerning

  Mahesh

  Hello

  You can use the command packet--draw to get the results you're after... that is to say if a 10.1.1.10 client attempts to access google dns, you can use the following syntax:

  plotter of entrance inside the 10.1.1.10 udp packets 53 8.8.8.8 53 detailed (I may have the syntax a bit but you can tab your way through this).

  Thank you

  Sent by Cisco Support technique iPad App

• How to determine the size of a table partition

  Hello
  
  Can anyone share please sql code that can be used to list the size of a partition table? I would appreciate it a lot.
  
  Thank you
  
  Scott
  
  Version Oracle 11.2.0.1

  Select
  Sum(bytes/1024/1024)
  Of
  dba_segments
  where
  nom_segment = "MYTABLE";

  Select
  owner,
  nom_segment,
  nom_partition,
  segment_type,
  bytes / 1024/1024 "MB".
  Of
  dba_segments
  where
  nom_segment in ('SEG1', 'SEG2","SEG3");

  Select
  owner,
  nom_segment,
  nom_partition, segment_type, bytes/1024/1024 "MB"
  Of
  dba_segments
  where
  segment_type = "PARTITION TABLE";

• How can I display if given blank table is not present

  Hi all
  
  
  I have a problem here.
  I need to display an empty array if there is no data. by default, it shows right column name box.
  now, I need to add a blank under the column name.
  
  If you have any advice, please let me know.
  
  
  
  Kind regards
  dityo

  I sent you a reply to the email I received from you. Please take a look.

  If you think you have been helped, please give points and close the thread.

  Thank you
  Bipuser

• How to check the Windows key is original and unique user only

  Hello

  If I will buy another retailer windows operating system. so, how to check the windows key is original or not?

  How to check the windows key is single user or three key user? How to learn about the windows key?

  Hello

  Find the key data is any tool?

  In my State, one of the retailer sold out of the window in two different users. the key is the same. But I did not how many users should be used the key to this series?

  That's why i, m here asking you friends

  Then you have been sold an illegal license key, as a license key is never sold on its own, more a license key is never awarded to two different clients.

• How to determine the strict reference to the table of waveform

  Hello

  I want to change the properties of a waveform by programming. I used to get all references maps of waveform a function of range in my script VI VI. Then I typecasted references to more specific class (strict-single track) after this trial I was able set properties such as data history. Everything works fine but if I add a graphic that is multiplot, that this approach does not work.

  The problem is that in the table of references, there is reference to a graph in multiplot waveform, and this reference is not possible typcast to the more specific category (strict-single parcel).

  My question is: how to determine if the reference in the table is matching the proper waveform (single or multiplot) charts.

  In the VI attached is a code that demonstrates my problem.

  Thanks a lot for the replies

  Jan

  Thank you for advice. VI point 2 from your answer, I created and it works. The solution is attached.

  If I understand it correctly. I need to know the type of chart to come.

  My first idea was to create a VI in Drop that initializes all the graphics of VI on chart type independently.

  But this solution is fine because I will only use graphics-single plot and multiplot(two elements).

  Thank you

  Jan

• How to find the primary key columns in the tables in MS Access using SQL queries

  How to find the primary key columns in the tables in MS Access using SQL queries

  Hello

  This is the forum for Windows Vista programs related issues.

  For better assistance, please try instead the Forums in SQL Server .

  Thank you! Vincenzo Di Russo - Microsoft MVP Windows Internet Explorer, Windows Desktop Experience & security - since 2003. ~ ~ ~ My MVP profile: https://mvp.support.microsoft.com/profile/Vincenzo

• How to disable the product key Windows Server 2008 R2 on Oracle Virtual Box?

  Original title: disable the windows server 2008 r2 key

  I have oracle VM and activated windows server 2008 r2 on a virtual machine. I just VMware workstation God 9 and I would like to reactivate in a VMware virtual machine. How can I disable the key so that it can be reactivated?

  Click Start, type: CMD
  Right-click on CMD
  Click on run as administrator
  At the command prompt, type: slmgr.vbs - upk

  Press enter, this will uninstall the product key of the computer and to the evaluation mode, you are now free to use it on another computer. If you experience problems, try to activate by phone:
  Activate Windows 7 manually:
  1. click on start and in the search for box type: slui.exe 4

  2. press enter on your keyboard

  3. Select your country.
  4. Select the telephone activation option and brace yourself for a real person.

• How to understand the implementation of the plan in oracle I mean if I see two implementation plans for a single sql_id plans 2 How to determine the best execution plan? Links and answers are much appreciated. Thank you

  How to understand the implementation of the plan in oracle I mean if I see two implementation plans for a single sql_id plans 2 How to determine the best execution plan? Links and answers are much appreciated. Thank you

  How to understand the implementation of the plan in oracle I mean if I see two implementation plans for a single sql_id plans 2 How to determine the best execution plan? Links and answers are much appreciated. Thank you

  After two execution plans that have the same sql_id, so we can see what you're talking about.

  See "Oracle Explain Explain Plan optimizer" by Maria Colgan of the Oracle optimizer group

  http://www.Oracle.com/technetwork/database/bi-Datawarehousing/TWP-explain-the-explain-plan-052011-393674.PDF

  Examine the various aspects of a selectivity to parallel execution plan

  performance and understand what information you should be brilliant

  the plan can be overwhelming even for the most experienced DBA. This document

  offers a detailed explanation on each of the aspects of the execution plan and a

  Overview of what caused the CBO to make the decision, he did.