Updating sql tables when joined

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I presumed therefore you really mean to join to T by some key and then update value.

You cannot use the update of a join in this case because the database currently wants you to JOIN to T on all of these columns - selecting where fld_name ='A' is insufficient.

Lead ID FROM Retrieve Account Number WHERE Sales_Import.leadid = Retrieve Account Number. No SELECT * FROM @TB1 UPDATE table1 SET table1.column = 'some_new_val' WHERE table1IN ( SELECT * FROM ( SELECT table1FROM table1 LEFT JOIN table2 ON ( table2.column = table1.column ) WHERE table1.column = 'some_expected_val' AND table12.column IS NULL ) AS Xalias ) UPDATE table1 SET table1.column = 'some_new_val' WHERE table1IN ( SELECT * FROM ( SELECT table1FROM table1 JOIN table2 ON ( table2.column = table1.column ) WHERE table1.column = 'some_expected_val' ) AS Xalias ) UPDATE Table_A SET Table_A.

Lead ID) DECLARE @TB1 TABLE ( No Int , Name NVarchar(50) ,link No int ) DECLARE @TB2 TABLE ( No Int , Name NVarchar(50) ,link No int ) INSERT INTO @TB1 VALUES(1,'changed person data', 0); INSERT INTO @TB1 VALUES(2,'old linked data of person', 1); INSERT INTO @TB2 SELECT * FROM @TB1 WHERE link No = 0 SELECT * FROM @TB1 SELECT * FROM @TB2 UPDATE @TB1 SET Name = T2. No = T1No SELECT * FROM @TB1 UPDATE application SET omts_received_date = ( SELECT date_created FROM application_history WHERE = application_history.application_id AND application_history.application_status_id = 8 ); DECLARE @TB1 TABLE ( No Int , Name NVarchar(50) ) DECLARE @TB2 TABLE ( No Int , Name NVarchar(50) ) INSERT INTO @TB1 VALUES(1,'asdf'); INSERT INTO @TB1 VALUES(2,'awerq'); INSERT INTO @TB2 VALUES(1,';oiup'); INSERT INTO @TB2 VALUES(2,'lkjhj'); SELECT * FROM @TB1 UPDATE @TB1 SET Name =S.

However, we can use merge to do this in bulk: update (select t.value,s.value new_value 2 from t, s 3 where = s.key_to_t 4 and s.fld_name = 'A') 5 set value = new_value 6 / set value = new_value * ERROR at line 5: ORA-01779: cannot modify a column which maps to a non key-preserved table ops$tkyte%ORA10GR2 MERGE INTO T USING (SELECT * FROM S WHERE FLD = 'A') S ON (T. OLD_VALUE) WHEN MATCHED THEN UPDATE SET VALUE = OLD_VALUE; UPDATE allows me to join on VALUE but MERGE dont i get the error.

ERROR at line 3: ORA-38104: Columns referenced in the ON Clause cannot be updated: "T"."VALUE" Why is it so..

Account Number FROM Retrieve Account Number WHERE Sales_Import.leadid =Retrieve Account Number.

Lead ID) WHERE Sales_Import.leadid = (SELECT Retrieve Account Number.

Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place. The path of least resistance can be a slippery slope. Since random numbers are too important to be left to chance, let's generate some! So, one statement gives you: INSERT into 3 tables DELETE from 1 table, INSERT into 2UPDATE into 1, INSERT into 2MERGE into 1, INSERT into 2?

And again problem with JOIN UPDATE comes when i want to insert MERGE INTO T USING (SELECT * FROM S WHERE FLD = 'A') S ON (T. OLD_VALUE) WHEN MATCHED THEN UPDATE SET VALUE = OLD_VALUE; UPDATE allows me to join on VALUE but MERGE dont i get the error. SQL July 16, 2012 - pm UTC the issue is the use of the p.value in the ON clause and in the UPDATE clause.

ERROR at line 3: ORA-38104: Columns referenced in the ON Clause cannot be updated: "T"."VALUE" you wrote " ... May be that way we can understand MERGE in a better way. Attribute ID AND ( 6 CASE WHEN LOWER(s.value) = LOWER(p.value) THEN 1 ELSE 2 END = 2 OR 7 CASE WHEN LOWER(s.value) = LOWER(p.value) THEN 1 ELSE 2 END = 2 8 ) 9 ) 10 WHEN MATCHED THEN 11 UPDATE SET p. It has nothing to do with efficiency one way or the other - you are not allow to update columns used in the ON clause.

The following table summarizes specific instances in which you might or might not be able to update results obtained through an updatable keyset-driven cursor.

CREATE TABLE ABC (Id INT, Name VARCHAR(10))INSERT INTO ABC VALUES (1, 'PK'), (2, 'SK')CREATE TABLE ABC1 (Id INT, Name VARCHAR(10))INSERT INTO ABC1 VALUES (1, 'KKKKK'), (2, 'MMMMM')UPDATE A SET A. The path of least resistance can be a slippery slope. Since random numbers are too important to be left to chance, let's generate some! Understanding and using APPLY, (I) and (II) Paul White Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden Exploring Recursive CTEs by Example Dwain Camps INDEXing a poor-performing query is like putting sugar on cat food. MERGE can also delete at the same time too can't it?

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