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Similar Questions

• How to manage the threads for TCP communication?

  Hello

  I have a project to control two separate applications (C++ and LabView) and two of them are implemented as server. Another client program (C++) is used to control applications. Communication between them are implemented using TCP socket. The client program sends the message to start or stop tasks on servers. The client program also sends time (HH) with the message start and end to determine when to start or stop.

  Application in C++ (server): Listening to the request for the connection and when gets one, it creates a thread of communication allowing to manage this and listen again to another connection. Communication wire crossing of handles and messages when it receives a start or a stop message, it creates a thread of timer with the received time to trigger a task at the time specified. And after that he expects the client message. So, here, when the thread (communication, timer) is necessary, it is created.

  In LabView (server): I tried to create the same as the C++ server. But, in manual of LabView and other discussions of the forum, I got that LabView is multithreaded and it can be done with the help of the loop independent. So, I had to create four loops in a diagram:

  1. wait the new connection

  2 manage the communication for the already received connection

  3. start the timer

  4 stop the timer

  and they are executed at the beginning of execution and communication between them are managed using local variables. But, 2, 3 and 4th loop can handle only one connection and it can handle another if the current is closed. The C++ application can handle multiple connections by creating the thread when it is necessary, but not at the beginning of the application.

  Is there a better way to implement this in LabView?

  Is it possible to manage multiple connections and create the diagram node/block (such as a wire) dynamically as C++?

  Thank you.

  There are several ways to do so in modern LabVIEW and you should probably seek the Finder example for TCP examples. The classic is to transfer the refnum of connecting the listening loop in a communications loop that adds to an array of login credentials and then constantly iterates through this array to make the communication. He works on LabVIEW 4.0 perfectly for me even for applications with basic HTTP communication protocol. But you must make sure that the communication for a connection is not delaying his work for reasons that would delay the handling of other connections too, because they are really of course worked on sequentially. If you encounter an error, the connection ID is closed and removed from the table.

  The other is that create you a VI that makes your entire communication and ends on an error or when the order quite. Make this reentrant VI and then launch it through VI server as the instance home, passing the refnum of newly received connection form the listening loop. Then use the method to Run let start and operate as an independent thread.

  For all these, you should be able to find an example in the example Finder when searching for TCP.

• Programming of the digital I/o pins on the NOR myRIO-9100 for serial communication

  I use NEITHER myRIO for my robot and I want to use four reading of the distance sensors that communicate via the serial port. But the myRIO has only two UART ports on board so I was wondering if there is a way to program the digital pins use for serial communication. Any help appreciated.

  It is possible.  Here is an example that I could find.

  Example of reference to RS-232 for LabVIEW FPGA Interface

• Type a table defined clusters to hold configuration data - definition of default values for each element of the array

  Hello

  I was wondering if I could get some information and opinions on the use of an array of type defined clusters to store configuration data.  I am creating a program to test several EHR and wanted to have a control of type defined for each HAD with the information needed to create the DAQmx tasks for all signals for it must HAVE.  I am eager to do so that the data are encoded in hard and not in a file that the user might spoil.

  Controls of type def are then put into a Subvi who chooses as appropriate, one based on the enumeration of Type DUT connected to a case structure.

  I have problems with the control of the defined type.  I see issues when you try to save a configuration unique to each element of the array in the array of clusters.  Somehow, it worked at first, but now by clicking on "Operations on the data--> default font of the current value ' on individual elements of the cluster or the entire cluster (array element) does not save data when I re - open the command def.  What I am doing wrong?  I'm trying to do something with the berries of the clusters that I shouldn't do?

  I enclose one of the defined reference type controls.  I tried to change it bare to see if that helped, but no luck.

  To reproduce, change the resource string for the element 0 of the array and do the new value by default.  Then close the def of type, and then reopen it.  The old value is always present in this element.  The VI is saved in LabVIEW 2012.

  The values of a typedef are not proprigated to the instances of the control. They get if created WHEN data values have changed. They will be not updated with the changes to come. You must create a VI specifically to hardcode your values or to implement a file based initialization. The base file would be much better and more flexible. If you don't want users to change the data simply encryption. There is a wedding blowfish library that you can download.

• How to find the value max and min for each column in a table 2d?

  How to find the value max and min for each column in a table 2d?

  For example, in the table max/min for the first three columns would be 45/23, 14/10, 80/67.

  Thank you

  Chuck,

  With color on your bars, you should have enough experience to understand this.

  You're a loop in the table already.  Now you just need a function like table Max and min. loop.  And you may need to transpose the table 2D.

• BlackBerry Z10 well defined, I can't get the phone to ring and vibrate as the default value for all calls. I can put individual contacts, but I want to ring and vibrate for all.

  Although the value, I can not phone ring and vibrate as the default value for all calls. I can put individual to vibrate and ring contacts and it works but I want as the default for all incoming calls. Any help would be appreciated, thanks

  Sorry, I found the answer in the manual

  "Change your ringtone, sounds or alerts.

  GoTo settings\notifications to the bottom of the screen select application\phone

  You can activate vibrate out there, put the ringer default etc.

• call a stored procedure for each row in the transitional attribute and display the data in the form of af: table. The other rows are based on the entities

  Hi Experts,

  JDeveloper 12.1.3.0.0

  I have a VO based on entity object. With a column of the VO is transient attribute (I created).

  I need to call a stored procedure for each row in the transitional attribute and display the data in the form of af: table. As well as other attributes.

  So can anyone suggest how can I achieve this?

  Thank you

  AR

  I think that you need a stored function (which returns the value) in this case, is not?

  Take a look at:

  https://docs.Oracle.com/CD/B31017_01/Web.1013/b25947/bcadvgen005.htm

  and search for:

  Invoking stored function with only Arguments in

  call your function in the Get attribute and return value accessor...

• SQL query to retrieve a single record for each employee of the following table?

  Hi all

  Help me on the writing of SQL query to retrieve a single record for each employee of the following table? preferably a standard SQL.

  CREATE TABLE xxc_contact)

  empnum NUMBER,

  alternatecontact VARCHAR2 (100),

  relationship VARCHAR2 (10),

  phtype VARCHAR2 (10),

  Phone NUMBER

  );

  insert into xxc_contact values (123456, 'Rick Grimes', 'SP', 'Cell', 9999999999)

  insert into xxc_contact values (123456, 'Rick Grimes', 'SP', 'Work', 8888888888)

  insert into xxc_contact values (123457, 'Daryl Dixon', 'EN', 'Work', 7777777777)

  insert into xxc_contact values (123457, 'Daryl Dixon', 'EN', 'Home', 3333333333)

  insert into xxc_contact values (123456, 'Maggie Greene', 'CH', 'Cell', 9999999999)

  insert into xxc_contact values (123456, 'Maggie Greene', 'CH', 'Home', 9999999999)

  expected result:

  EmpNum AlternateContact Relationship PhType Phone       

  123456 rick Grimes SP cell 9999999999

  Daryl Dixon EN work 7777777777 123457

  Home 123458 Maggie Greene CH 6666666666

  Thanks in advance.

  994122 wrote:

  Thank you all, that I got a result

  http://www.orafaq.com/Forum/m/620305/#msg_620305

  By Lalit Kumar B...

  Specifically, the two simple solutions provided were:

  1 using the row_number, entitled Oracle ranking based on descending order of the inside telephone each empnum group. And finally selects the lines which has least rank (of least since that order is descending for phone).

  SQL > column alternatecontact format A20;

  SQL >

  SQL > SELECT empnum, alternatecontact, relationship, phtype, phone

  2 from (SELECT a.*, row_number() over r (PARTITION BY empnum ORDER BY phone / / DESC))

  3 FROM xxc_contact one)

  4. WHEN r = 1

  /

  EMPNUM ALTERNATECONTACT RELATIONSHIP PHTYPE PHONE

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

  123456 rick Grimes SP cell 9999999999

  Daryl Dixon EN work 7777777777 123457

  Home 123458 Maggie Greene CH 6666666666

  2. with the help of MAX, Oracle automatically assigns the maximum phone for all the rows in each group of empnum. And finally selects the rows with the maximum phone. Order by clause is omitted here intentionally. You can find out why.

  SQL > SELECT empnum, alternatecontact, relationship, phtype, phone

  2 (SELECT a.*, MAX (phone) over (PARTITION BY empnum) rn FROM xxc_contact one)

  3 WHERE phone = rn

  4.

  EMPNUM ALTERNATECONTACT RELATIONSHIP PHTYPE PHONE

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

  123456 rick Grimes SP cell 9999999999

  Daryl Dixon EN work 7777777777 123457

  Home 123458 Maggie Greene CH 6666666666

  Kind regards

  Lalit

• Is it possible to create a tag that lists the individual labels [keywords] for each position? The current {tag_blogtaglist} creates an endless list of tags.

  Is it possible to create a tag that lists the individual labels [keywords] for each position? The current {tag_blogtaglist} creates an endless list of tags.

  If you can get hands on with the ID of blog post that you can list the tags assigned to this post particularly blog using module_data. It would be only possible with the new BC. Active following rendering engine. Here are some resources to point you in the right direction: how to activate the BC. Next - http://docs.businesscatalyst.com/developers/liquid/introduction-to-liquid#enable how to use module_data - odule_data http://docs.businesscatalyst.com/developers/liquid/consuming-apis-in-the-front-end-using-m install app BC API discovered to get you started on the syntax - http://docs.businesscatalyst.com/developers/apps/bc-api-discovery module data that lists the tags assigned to a blog post looks like this: {module_data = 'blogposts' version = "v3" field resource = subresource 'tag' = "tags" resourceId = collection "303870" = "myData"} resourceId is the blog ID to render tags for. Hope this helps, Mihai

• Search DR. for line of dashboard, dynamic table to retrieve the offices assigned table

  Hello

  
  I don't have information on the role of the user when running in the session variable.
  Not in the database.

  
  Now, to get office that manages a Manager I need to get the role, i.e. "areamanager".
  and the username "mike01" to recover the offices "mike01" manages (sql with two parameters?).

  It is possible that a local 'bob12' Office Manager uses the same table edge OBIEE but for him
  the role is 'localmanager' and he would see only the office works in, not all the other offices "mike01" also manages.

  
  If I had roles in an array of DB Oracle, it would be easy. I'd create just a view of the mapping.
  The problem is, I do not have this information in the DB, but I need
  to prefilter the dash prompt, so the "localmanager" can't select
  all offices but only his own. "mike01" on the other hand, all its functions.

  Now, how do I do that? I thought about the new .rpd 11g function lookup table to pass session variables to
  a SQL function or procedure. Which seems doable?

  Hi metalray,

  Not sure about the transmission session variables return from a procedure...

  But a simple way to do this is to have several guests, one for each role.  Filter them according to your requirements, place them on the dashboard and conditionally hide them based on the role of the user so that only the appropriate message appears.

  JB

• Use FOR... LOOP counter in the treatment of PL/SQL procedures with nest. Table

  Hi all!
  I learn PL/SQL on the book by Steve Bobrovsky (specified below, sample comes from it) and I have a question.
  
  In the procedure of the below specified program used a currentElement integer variable to get the reference to the line in the nested table of data type % ROWTYPE.
  Meanwhile, the program itself uses a common FOR... LOOP counter I have.

  DECLARE
   TYPE partsTable IS TABLE OF parts%ROWTYPE;
   tempParts partsTable := partsTable();
   CURSOR selectedParts IS 
    SELECT * FROM parts ORDER BY id;
   currentPart selectedParts%ROWTYPE;
   currentElement INTEGER;
   PROCEDURE printParts(p_title IN VARCHAR2, p_collection IN partsTable) IS
    BEGIN
     DBMS_OUTPUT.PUT_LINE(' ');
     DBMS_OUTPUT.PUT_LINE(p_title || ' elements: ' || p_collection.COUNT);
     currentElement := p_collection.FIRST;
     FOR i IN 1 .. p_collection.COUNT
     LOOP
      DBMS_OUTPUT.PUT('Element #' || currentElement || ' is ');
       IF tempParts(currentElement).id IS NULL THEN DBMS_OUTPUT.PUT_LINE('an empty element.');
       ELSE DBMS_OUTPUT.PUT_LINE('ID: ' || tempParts(currentElement).id || ' DESCRIPTION: ' || tempParts(currentElement).description);
       END IF;
      currentElement := p_collection.NEXT(currentElement);
     END LOOP;
   END printParts;
  BEGIN
   FOR currentPart IN selectedParts
   LOOP
    tempParts.EXTEND(2);
    tempParts(tempParts.LAST) := currentPart;
   END LOOP;
   printParts('Densely populated', tempParts);
   FOR i IN 1 .. tempParts.COUNT
   LOOP
    IF tempParts(i).id is NULL THEN tempParts.DELETE(i);
    END IF;
   END LOOP;
   FOR i IN 1 .. 50
   LOOP
    DBMS_OUTPUT.PUT('-');
   END LOOP;
   printParts('Sparsely populated', tempParts);
  END;
  /

  When I substituted a global variable of INTEGER type such for... The LOOP counter, an APEX have returned an error "ORA-01403: no data found.

  DECLARE
   TYPE partsTable IS TABLE OF parts%ROWTYPE;
   tempParts partsTable := partsTable();
   CURSOR selectedParts IS 
    SELECT * FROM parts ORDER BY id;
   currentPart selectedParts%ROWTYPE;
   PROCEDURE printParts(p_title IN VARCHAR2, p_collection IN partsTable) IS
    BEGIN
     DBMS_OUTPUT.PUT_LINE(' ');
     DBMS_OUTPUT.PUT_LINE(p_title || ' elements: ' || p_collection.COUNT);
     FOR i IN 1 .. p_collection.COUNT
     LOOP
      DBMS_OUTPUT.PUT('Element is ');
       IF tempParts(i).id IS NULL THEN DBMS_OUTPUT.PUT_LINE('an empty element.');
       ELSE DBMS_OUTPUT.PUT_LINE('ID: ' || tempParts(i).id || ' DESCRIPTION: ' || tempParts(i).description);
       END IF;
     END LOOP;
   END printParts;
  BEGIN
   FOR currentPart IN selectedParts
   LOOP
    tempParts.EXTEND(2);
    tempParts(tempParts.LAST) := currentPart;
   END LOOP;
   printParts('Densely populated', tempParts);
   FOR i IN 1 .. tempParts.COUNT
   LOOP
    IF tempParts(i).id is NULL THEN tempParts.DELETE(i);
    END IF;
   END LOOP;
   FOR i IN 1 .. 50
   LOOP
    DBMS_OUTPUT.PUT('-');
   END LOOP;
   printParts('Sparsely populated', tempParts);
  END;
  /

  When I tried to manage this code in SQL * Plus, the following picture emerged:

  Densely populated elements: 10
  Element is an empty element.
  Element is ID: 1 DESCRIPTION: Fax Machine
  Element is an empty element.
  Element is ID: 2 DESCRIPTION: Copy Machine
  Element is an empty element.
  Element is ID: 3 DESCRIPTION: Laptop PC
  Element is an empty element.
  Element is ID: 4 DESCRIPTION: Desktop PC
  Element is an empty element.
  Element is ID: 5 DESCRIPTION: Scanner
  --------------------------------------------------
  Sparsely populated elements: 5
  DECLARE
  *                                                 
  ERROR at line 1:                                  
  ORA-01403: no data found                          
  ORA-06512: at line 14                             
  ORA-06512: at line 35

  What's not in the code (or what I did not understand)? Help please!

  Your error occurs because you are dealing with a sparsely populated collection and using an index for items that do not exist.

  For collections of the low density of population, you must iterate through using FIRST and THEN as modeled not from 1 to COUNT.

  The crucial difference between your code and the example is:

  tempParts(i)
  

  Which, as you have demonstrated, doesn't work very well (!) if there is no item (i).

  The code example is a little unusual in my opinion.

     currentElement := p_collection.FIRST;
     FOR i IN 1 .. p_collection.COUNT
     LOOP
      ...
      currentElement := p_collection.NEXT(currentElement);
     END LOOP;
  

  It works, but it's an unusual way to iterate through a collection of rare which is perhaps most often done like this:

     currentElement := p_collection.FIRST;
     WHILE(currentElement IS NOT NULL)
     LOOP
      ...
      currentElement := p_collection.NEXT(currentElement);
     END LOOP;
  

  Which is perhaps less open to confusion.

  In the end, the distinction between

  tempParts(currentElement).id
  

  and

  tempParts(i).id
  

  is crucial.

• I need a query that selects the amount of records for each day of a table.

  I need a query that selects the amount of records for each day of a table.
  For example, the result would be:
  
  1 14 date
  Date 2-3
  
  etc.
  
  Any ideas?

  Sort:

  SELECT count ([IDCommentaire]), convert (varchar, dateAdded, 112)

  OF COMMENTSgroup by convert (varchar, dateAdded, 112)

• Creation of 5 rows in table B for each row in the table has

  create table A
  (col1 number,
  col2 varchar2(20)
  )
  /
   
  create table B
  (col1 number,
  col2 varchar2(20)
  )
  /
  
  insert into A values (1,'Jane');
  insert into A values (2,'Kate');
  insert into A values (3,'Stomp');
  
  
  SQL> select * from a;
  
        COL1 COL2
  ---------- -----------------
           1 Jane
           2 Kate
           3 Stomp

  For each row in the table, I want 5 rows to be created in the table b. table B should look like

      COL1   COL2
  ---------- -----------------
           1 Jane
           2 Jane
           3 Jane
           4 Jane
           5 Jane
           6 Kate
           7 Kate
           8 Kate
           9 Kate
           10 Kate
           11 Stomp
           12 Stomp
           13 Stomp
           14 Stomp
           15 Stomp

  How can I do this?

  Hello

  A way

  insert into b
  select rownum*5  , col2 from a
  union all
  select rownum*5+1, col2 from a
  union all
  select rownum*5+2, col2 from a
  union all
  select rownum*5+3, col2 from a
  union all
  select rownum*5+4, col2 from a
  

  Concerning
  Anurag

• Select the last value for each day of the table

  Hello!
  
  I have a table that contains several measures for each day. I need two queries on this table, and I'm not sure how to write them.
  
  The table stores the rows (sample data)
  

  *DateCol1                 Value       Database*
  27.09.2009 12:00:00       100           DB1
  27.09.2009 20:00:00       150           DB1
  27.09.2009 12:00:00       1000          DB2
  27.09.2009 20:00:00       1100          DB2
  28.09.2009 12:00:00       200           DB1
  28.09.2009 20:00:00       220           DB1
  28.09.2009 12:00:00       1500          DB2
  28.09.2009 20:00:00       2000          DB2

  Explanation of the data in the sample table:
  We measure the size of the data files belonging to each database to one or more times a day. The value column indicates the size of the files of database for each database at some point (date in DateCol1 European model).
  
  
  What I need:
  Query 1:
  The query must return to the last action for each day and the database. Like this:

  *DateCol1       Value      Database*
  27.09.2009        150          DB1
  27.09.2009       1100          DB2
  28.09.2009        220          DB1
  28.09.2009       2000          DB2

  Query 2:
  The query should return the average measurement for each day and the database. Like this:

  *DateCol1       Value      Database*
  27.09.2009       125          DB1
  27.09.2009      1050          DB2
  28.09.2009       210          DB1
  28.09.2009      1750          DB2

  Could someone please help me to write these two queries?
  
  Please let me know if you need further information.
  
  Published by: user7066552 on September 29, 2009 10:17
  
  Published by: user7066552 on September 29, 2009 10:17

  Why two queries when it suffice ;)

  SQL> select dt
    2       , db
    3       , val
    4       , avg_val
    5    from (
    6  select dt
    7       , val
    8       , db
    9       , row_number () over (partition by db, trunc (dt)
   10                                 order by dt desc
   11                            ) rn
   12       , avg (val) over (partition by db, trunc (dt)) avg_val
   13    from test)
   14   where rn = 1
   15  order by dt
   16  /
  
  DT        DB           VAL    AVG_VAL
  --------- ----- ---------- ----------
  27-SEP-09 DB2         1100       1050
  27-SEP-09 DB1          150        125
  28-SEP-09 DB2         2000       1750
  28-SEP-09 DB1          220        210
  

• trigger for update field in a table with the sum of the fields to another table

  My experience in creation of triggers and pl/sql in general can be described in terms of oracle with the null value. I practiced by creating arrays and applications on my personal server at home to help me with some of my work related tasks. Right now I am creating a trigger which will, after insert, update, delete on the update of the table assignment_time_track the area of the time_spent on the table of assignments with the sum of the time_spent on the assignment_time_track table fields. I hope that run on the sentence it is clear to the people other than me. I tried this script on my own using the tool of creation of trigger for Oracle Database Express Edition, but I get the following error:
  
  Create a trigger failed, for the following reason:
  ORA-06552: PL/SQL: ORA-06553 finished Compilation unit analysis: PLS-320: the declaration of the type of the expression is incomplete or incorrect
  
  Here is my attempt to create the trigger on my own.
  
  create or replace trigger "ASSIGNMENT_TIME_TRACK_T1".
  AFTER
  INSERT or update or delete on 'ASSIGNMENT_TIME_TRACK '.
  for each line
  Start
  update assignments
  Set time_spent = (select sum (time_spent)
  of assignment_time_track
  where assignment_time_track.name = assignments.name);
  
  end;
  /
  
  
  If what I posted is not clear or more detail is needed, let me know and I will respond with a full description of tables and my goals for each table. Thanks in advance for any help. I also gladly accepts links to tutorials or lessons that explain how to do this kind of thing.
  
  Published by: bobonthenet on March 9, 2009 14:01

  I think I understand what you mean :)

  Rather than use a trigger to keep the master table (assignments) in sync with the time spent on the details, it would be much easier to use a query to do this, maybe creating a view.

  Something along the lines of

  SQL> create table assignments
    2  (id number primary key
    3  ,name varchar2(10)
    4  );
  
  Table created.
  
  SQL>
  SQL> create table assignment_time_tbl
    2  (id number primary key
    3  ,assid number references assignments
    4  ,time_spent number
    5  );
  
  Table created.
  
  SQL>
  SQL> insert into assignments
    2  select rownum
    3       , 'a'
    4    from all_objects
    5   where rownum < 5
    6  /
  
  4 rows created.
  
  SQL>
  SQL> insert into assignment_time_tbl
    2  select rownum
    3       , rownum
    4       , rownum * 3
    5    from all_objects
    6   where rownum < 5
    7  /
  
  4 rows created.
  
  SQL>
  SQL> commit;
  
  Commit complete.
  
  SQL>
  SQL>
  SQL> select a.id
    2       , a.name
    3       , (select sum (time_spent)
    4            from assignment_time_tbl
    5           where assid = a.id
    6         )
    7    from assignments a
    8  /
  
          ID NAME       (SELECTSUM(TIME_SPENT)FROMASSIGNMENT_TIME_TBLWHEREASSID=A.ID)
  ---------- ---------- -------------------------------------------------------------
           1 a                                                                      3
           2 a                                                                      6
           3 a                                                                      9
           4 a                                                                     12