Sql updating a table from another table

thanks UPDATE Sales_Import SET Account Number = (SELECT Retrieve Account Number. Account Number FROM Retrieve Account Number WHERE Sales_Import.leadid =Retrieve Account Number. I don’t dig into the internals of statistics and optimization in this post. ⇒ Be a proactive: If you have millions of rows in some of your tables, you can get burned by doing no statistics maintenance at all if query performance stats to get slow and out of date statistics are found to be the cause.If you’re interested in that, head on over and read the fahhhbulous white paper, Statistics Used by the Query Optimizer in SQL Server 2008. Unfortunately, Aristotle was right when it comes to statistics maintenance in SQL Server. This is because you didn’t do any proactive work at all. Col2 AS _Col2 FROM T1 JOIN T2 ON T1= T2/*Where clause added to exclude rows that are the same in both tables Handles NULL values correctly*/ WHERE EXISTS(SELECT T1. UPDATE suppliers SET supplier_name = (SELECT FROM customers WHERE customers.customer_id = suppliers.supplier_id) WHERE EXISTS (SELECT FROM customers WHERE customers.customer_id = suppliers.supplier_id); UPDATE Table SET Table.col1 = other_table.col1, Table.col2 = other_table.col2 --select Table.col1, other_table.col, Table.col2,other_table.col2, * FROM Table INNER JOIN other_table ON = other_UPDATE from SELECT with INNER JOIN in SQL Database Since there are too many replies of this post, which are most heavily up-voted, I thought I would provide my suggestion here too. This also has the same limitation as the proprietary This may be a niche reason to perform an update (for example, mainly used in a procedure), or may be obvious to others, but it should also be stated that you can perform an update-select statement without using join (in case the tables you're updating between have no common field).

If you’re managing lots of SQL Server instances and want ultimate customization, there is a free version of Minion Reindex. The answers to both of these questions impact what it does to GROUP those rows and SUM the Name Count column.

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.

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

-- the join clause is whatever suits you DECLARE @tbl1 TABLE (id INT, col1 VARCHAR(10), col2 VARCHAR(10)) DECLARE @tbl2 TABLE (id INT, col1 VARCHAR(10), col2 VARCHAR(10)) INSERT @tbl1 SELECT 1, 'a', 'b' UNION SELECT 2, 'b', 'c' INSERT @tbl2 SELECT 1, '1', '2' UNION SELECT 2, '3', '4' UPDATE t SET t.col1 = a.col1 ,t.col2 = a.col2 FROM ( SELECT id, col1, col2 FROM @tbl2) a INNER JOIN @tbl1 t ON = SELECT * FROM @tbl1 SELECT * FROM @tbl2 drop table uno drop table dos create table uno ( uid int, col1 char(1), col2 char(2) ) create table dos ( did int, col1 char(1), col2 char(2), [sql] char(4) ) insert into uno(uid) values (1) insert into uno(uid) values (2) insert into dos values (1,'a','b',null) insert into dos values (2,'c','d','cool') select * from uno select * from dos -- Sample data: --------------------------------------------------------------------------- CREATE TABLE #SOURCE ([ID] INT, [Desc] VARCHAR(10)); CREATE TABLE #DESTINATION ([ID] INT, [Desc] VARCHAR(10)) INSERT INTO #SOURCE VALUES(1,'Desc_1'), (2, 'Desc_2'), (3, 'Desc_3'); INSERT INTO #DESTINATION VALUES(1,'Desc_4'), (2, 'Desc_5'), (3, 'Desc_6'); --------------------------------------------------------------------------- UPDATE #DESTINATION SET #DESTINATION.[Desc] = #SOURCE.[Desc] FROM #SOURCE WHERE #DESTINATION.[ID] = #SOURCE.[ID] AND #Source.[Desc] = 'Desc_2' Merge into product P1 using Product_Bak P2 on P1= P2when matched then update set p1.[description] = p2.[description], p1= P2.

Name WHEN NOT MATCHED THEN insert (name, description) values(p2.name, P2.description); Thank you for your interest in this question.

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