Delete from two tables at the same time

Hi,
Is there way to delete from many tables at the same time ?
delete from tbl1, tbl2;
Thank you

953402 wrote:
Hi,
Is there way to delete from many tables at the same time ?
delete from tbl1, tbl2;
Thank youNO
Consider to actually Read The Fine Manual below
http://docs.oracle.com/cd/E11882_01/server.112/e26088/toc.htm

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[Bug] Writing to the same trace in Citadel from two Sources at the same time

Howdy
I am experiencing an issue and am looking to get some NI support:
I have two distributed applications that can write to a Citadel database at the same time.
And I am investigating the possibility of what would occur if both of them were writing to the same variable at the same time, with possibly the same timestamp data.
I did this in the attached VI by using the same timestamps with a constant for the data (either #1 or #2).
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When the data is dumped from Citadel this file contains 2001pts - 1000pts from each array and one separator (or break) point:
You cannot write an older timestamp to Citadel without it throwing an error, but from further testing it seems you can write the same timestamp repeatably. So I am guessing what is happening above is race condition that is somehow allowing two references to be opened to Citadel which should throw an error but it does not and this is somehow allowing both sets of data to be written by both loops??
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Attached VI was coded and tested using LabVIEW 2009 SP1, DSC 9.0.1, MAX 4.6.2f1
Certified LabVIEW Architect * LabVIEW Champion
Attachments:
dual_databaseWrite.vi ‏21 KB

Ben S wrote:
The race condition of opening the refererence in two places at once should still apply to two different VIs running at the sametime.
Will a CAR be lodged for this?
Ben S wrote:
If you open up the code and save it as a .vit, you don't get any missing VIs. Only when you change the extension without the aid of LabVIEW.
No VI should have missing members by simply renaming its extension outside of LabVIEW???
I think there is an issue with the VI.
Can you replicate the following and verify what I am seeing?
Attached is a Project with Main VI (contains a call to the Open Trace.vi polymorphic only), a Class and a Build Spec
If you Build the spec with the Main VI outside of the Class it works
If you place the VI in the Class, save then Build, the Spec fails with the error:
Visit the Request Support page at ni.com/ask to learn more about resolving this problem. Use the following information as a reference:
Error 1003 occurred at AB_Application.lvclasspen_Top_Level_VIs.vi -> AB_Build.lvclass:Build.vi -> AB_Application.lvclass:Build.vi -> AB_EXE.lvclass:Build.vi -> AB_Engine_Build.vi -> AB_Build_Invoke.vi -> AB_Build_Invoke.vi.ProxyCaller
Possible reason(s):
LabVIEW: The VI is not executable. Most likely the VI is broken or one of its subVIs cannot be located. Select File>>Open to open the VI and then verify that you are able to run it.
Visit the Request Support page at ni.com/ask to learn more about resolving this problem. Use the following information as a reference:
Error 1003 occurred at AB_Application.lvclass:Open_Top_Level_VIs.vi -> AB_Build.lvclass:Build.vi -> AB_Application.lvclass:Build.vi -> AB_EXE.lvclass:Build.vi -> AB_Engine_Build.vi -> AB_Build_Invoke.vi -> AB_Build_Invoke.vi.ProxyCaller
Possible reason(s):
LabVIEW: The VI is not executable. Most likely the VI is broken or one of its subVIs cannot be located. Select File>>Open to open the VI and then verify that you are able to run it.
Next place a disabled structure around the Polymorphic VI (as Class Member or not, it doesn't matter)
Save the VI
Close the VI
Open the VI - the Open Trace.vi polymorphic is "missing"
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-JG
Code in LV2009
Certified LabVIEW Architect * LabVIEW Champion
Attachments:
DSC.zip ‏341 KB

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Hi,
Oracle 10g2
I have 2 tables:
1. tab1 : Stores people info
2. tab2 : Stores people insurance info
Both have an address field.
What I need to do is when tab1.address is updated I want the tab2.address to update automatically and
when tab2.address is updated I want tab1.address to update.
Is there a way to do this using triggers without having these triggers mutate?
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Edited by: user635344 on Oct 8, 2009 11:04 AM

Hi, Oleg,
Centinul, Toon, Hoek and Peter are right. (It would be unusual if any one of them were wrong.)
The addresses really ought to be in one table.
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In the example below, I used a package variable as the flag. You could also use a SYS_CONTEXT or a Global Temporary Table.
CREATE TABLE tab1
(      id    NUMBER
,      addr VARCHAR2 (25)
DROP TABLE     tab2;
CREATE TABLE tab2
(      id    NUMBER
,      addr VARCHAR2 (25)
CREATE OR REPLACE PACKAGE pk_x
AS
    -- This package contains no functions or procedures, only 1 variable:
    table_of_origin     varchar2 (30);
END     pk_x;
CREATE OR REPLACE TRIGGER     tab1_aiu
AFTER INSERT OR UPDATE OF addr on tab1
FOR EACH ROW
BEGIN
     IF pk_x.table_of_origin IS NULL
     THEN
          pk_x.table_of_origin := 'TAB1';
          UPDATE tab2
          SET     addr     = :NEW.addr
          WHERE     id     = :NEW.id;
          pk_x.table_of_origin := NULL;
     END IF;
END     tab1_aiu;
CREATE OR REPLACE TRIGGER     tab2_aiu
AFTER INSERT OR UPDATE OF addr on tab2
FOR EACH ROW
BEGIN
     IF pk_x.table_of_origin IS NULL
     THEN
          pk_x.table_of_origin := 'TAB2';
          UPDATE tab1
          SET     addr     = :NEW.addr
          WHERE     id     = :NEW.id;
          pk_x.table_of_origin := NULL;
     END IF;
END     tab1_aiu;
/I made this example as simple as possible. Production code would be a lot more complicated (e.g., checking to see if id was changed).
I tested this using the DML statements below.
The contents of both tables is shown after each statement.
INSERT INTO tab1 (id, addr) VALUES (1, '1 First St.');
      ID_1 ADDR_1                          ID_2 ADDR_2
         1 1 First St.
INSERT INTO tab2 (id, addr) VALUES (1, 'Forstagatan 1');
      ID_1 ADDR_1                          ID_2 ADDR_2
         1 Forstagatan 1                      1 Forstagatan 1
UPDATE        tab1
SET        addr     = 'Primo Place'
WHERE        id     = 1;
      ID_1 ADDR_1                          ID_2 ADDR_2
         1 Primo Place                        1 Primo PlaceThe query that displayed the contents is:
SELECT tab1.id           AS id_1
,     tab1.addr     AS addr_1
,     tab2.id           AS id_2
,     tab2.addr     AS addr_2
FROM                tab1
FULL OUTER JOIN           tab2     ON     tab1.id     = tab2.id
ORDER BY   NVL (tab1.id, tab2.id);

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Any suggestion to make it work smoothly?
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Hi
this is probably the wrong way to do it, but this is how I did:
- I wanted a screen with 3 datagrids components retrieving data from 3 different tables.
- I could make it work while enabling 1 or 2 of them. When the 3 are enabled, I get this error:
btw its a huge msg, I will trim it:
ArgumentError: Can't find ManagedQuery or ManagedOperation named: getItems_paged at mx.data::RPCDataServiceAdapter/executeQuery()[C:\depot\DataServices\branches\lcds_modeler 101\frameworks\projects\data\src\mx\data\RPCDataServiceAdapter.as:325] at mx.data::RPCDataServiceAdapter/processDataMessage()[C:\depot\DataServices\branches\lcds_m odeler101\frameworks\projects\data\src\mx\data\RPCDataServiceAdapter.as:920] at RPCDataServiceRequest/invoke()[C:\depot\DataServices\branches\lcds_modeler101\frameworks\ projects\data\src\mx\data\RPCDataServiceAdapter.as:1668] at mx.data::DataStore/http://www.adobe.com/2006/flex/mx/internal::invoke()[C:\depot\DataServices\branches\lcds_m odeler101\frameworks\projects\data\src\mx\data\DataStore.as:3343] ... it continues forever.
the getItems_paged is a auto generated function inside the php class flex generates to handle the tables.
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Thanks in advance,
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You might be
able to design a trigger to do what you're talking
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Please remember to mark your question as "answered" if this solves your problem.

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Attachments:
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Delete from two tables at the same time

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