Updating multiple rows at a time in sql server
If the WHERE clause in an UPDATE statement matches multiple rows, the SET clause will be applied to all matched rows.
This rule allows you to update values on multiple rows in a single UPDATE statement.
Alternatively if its only a few records of a determinate nature, i would call the proc several times. "I'm living so far beyond my income that we may almost be said to be living apart I would suggest that it is a bad idea to ever allow a user to do a multiple record insert or update for data integrity reasons. Suppose you are Joe Blow user and you have a list of 100 records on your screen and you change 57 of them and click the submit button.
This all works fine as long as in the two hours it took you to do this, you don't lose power or accidentally close the application, etc.
This can also be used to change the column to NULL if the column has no default and is defined to allow null values.
Compound assignment operator: = Add and assign -= Subtract and assign *= Multiply and assign /= Divide and assign %= Modulo and assign &= Bitwise AND and assign ^= Bitwise XOR and assign |= Bitwise OR and assign Returns updated data or expressions based on it as part of the UPDATE operation. Table1 (c1 int PRIMARY KEY NOT NULL, c2 int NOT NULL); GO CREATE TABLE dbo. Table2 WHERE CURRENT OF abc; GO SELECT c1, c2 FROM dbo.
All other references to the object in the FROM clause must include an object alias. Table2; USE Adventure Works2012; GO IF OBJECT_ID ('dbo. columns, except in strings that contain only spaces. If ANSI_PADDING is set to ON, trailing spaces are inserted.
A view with an INSTEAD OF UPDATE trigger cannot be a target of an UPDATE with a FROM clause. The Microsoft SQL Server ODBC driver and OLE DB Provider for SQL Server automatically set ANSI_PADDING ON for each connection.
CREATE TABLE blog ( Id INT , Name VARCHAR(20) , Category VARCHAR(20) ) INSERT INTO blog(Id, Name, Category) SELECT 1,'dotnetcrunch','ASP.
Please note: The would be an atomic operation, either all rows would be inserted or none of them.
Hope you were able to follow the post on Inserting Multiple Rows at Once in SQL Server.
We have a highly concurrent system and havent noticed any significant problems (as yet).
SQL Server FAQ SQL Server FAQ - Updating Multiple Rows with One UPDATE Statement By: (Continued from previous topic...) How To Update Multiple Rows with One UPDATE Statement?
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And what happens if he did something wrong on the 33rd change.