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Common table expressions can also be used with the SELECT, INSERT, DELETE, and CREATE VIEW statements.For more information, see WITH common_table_expression (Transact-SQL). For information about table hints, see Table Hints (Transact-SQL).TOP ( ) Specifies one or more table hints that are allowed for a target table. @ When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter ' N'.If ' N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column.Let us start with a simple table: UPDATE staff SET salary = 1200 WHERE name = ' Bob'; UPDATE staff SET salary = 1200 WHERE name = ' Jane'; UPDATE staff SET salary = 1200 WHERE name = ' Frank'; UPDATE staff SET salary = 1200 WHERE name = ' Susan'; UPDATE staff SET salary = 1200 WHERE name = ' John'; UPDATE staff SET salary = 1200 WHERE name = ' Bob'; UPDATE staff SET salary = 1250 WHERE name = ' Jane'; UPDATE staff SET salary = 1200 WHERE name = ' Frank'; UPDATE staff SET salary = 1250 WHERE name = ' Susan'; UPDATE staff SET salary = 1200 WHERE name = ' John'; We are no longer setting all the salary fields to the same value, so we can’t collapse it into a single statement.But we can group the updates according to the value being set, and then do one UPDATE statement per distinct value.In this article I will show you a number of different ways to use the UPDATE statement to modify the data in your SQL Server tables.

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A more effective solution to this problem is to attempt to reduce the number of UPDATE statements.If you want to review the complete syntax of the UPDATE statement then please refer to Books Online.To properly show you how to use the UPDATE statement I will need to create a few tables to hold some sample data. Below is the code to create my Toy table: In order to show you how to UPDATE a table from data in another table I need to build a second sample data table that I will call New Toy Price.If you are an application programmer then you will more than likely need to write TSQL code to update your SQL Server database tables.In order to update a row in a SQL Server table you will use the UDPATE statement.

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