Updating fields in sql

Posted by / 23-Aug-2020 18:16

Updating fields in sql

Don't update a value with the same value, it generates extra logging and unnecessary overhead.

UPDATE Table SET Table.col1 = other_table.col1, Table.col2 = other_table.col2 FROM Table INNER JOIN other_table ON = other_WHERE Table.col1 ! = other_table.col2 OR ( other_table.col1 IS NOT NULL AND Table.col1 IS NULL ) OR ( other_table.col2 IS NOT NULL AND Table.col2 IS NULL ) ; WITH CTE AS (SELECT T1. At first, I have created a table named with schoolold and inserted few records with respect to their column names and execute it.

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 ); MERGE INTO Table Namea_A u using ( SELECT c4.

Would you like to answer one of these unanswered questions instead?

Although the question is very interesting, I have seen in many forum sites and made a solution using INNER JOIN with screenshots.

Account Number FROM Retrieve Account Number WHERE [Sales_Lead].[dbo].[Sales_Import]. UPDATE [Sales_Lead].[dbo].[Sales_Import] SET [Account Number] = Retrieve Account Number. No SELECT * FROM @TB1 merge into Sales_Import using Retrieve Account Number on (Sales_Import. Lead Id) when matched then update set Sales_Import. Account Number; 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.

This only works for a single column key, not composites.

usage: EXEC UPDATE_ALL 'source_table','destination_table','id_column' CREATE PROCEDURE UPDATE_ALL @SOURCE VARCHAR(100), @DEST VARCHAR(100), @ID VARCHAR(100) AS DECLARE @SQL VARCHAR(MAX) = 'UPDATE D SET ' -- Google 'for xml path stuff' This gets the rows from query results and -- turns into comma separated list.

DROP TABLE #TMP1 DROP TABLE #TMP2 CREATE TABLE #TMP1(Lead ID Int, Account Number NVarchar(50)) CREATE TABLE #TMP2(Lead ID Int, Account Number NVarchar(50)) INSERT INTO #TMP1 VALUES (147,'5807811235') ,(150,'5807811326') ,(185,'7006100100007267039'); INSERT INTO #TMP2 VALUES (147,'7006100100007266957') ,(150,'7006100100007267039') ,(185,'7006100100007267039'); UPDATE A SET A. Account Number FROM #TMP1 A INNER JOIN #TMP2 B ON A. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

See example below - it will only perform the update on 2 records despite linking on 3. Account Number Thank you for your interest in this question.

updating fields in sql-11updating fields in sql-15updating fields in sql-54

With a 100 columns, you mostly likely have a design problem...

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