Updating sql server
This can be more accurate than a searched update that uses a WHERE ] ) Specifies that optimizer hints are used to customize the way the Database Engine processes the statement. If the UPDATE statement could change more than one row while updating both the clustering key and one or more text, ntext, or image columns, the partial update to these columns is executed as a full replacement of the values.For more information, see Query Hints (Transact-SQL). Important The ntext, text, and image data types will be removed in a future version of Microsoft SQL Server.However, a large amount of data is more efficiently streamed into a file by using Win32 interfaces.When you update a FILESTREAM field, you modify the underlying BLOB data in the file system.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).
For example, in the UPDATE statement in the following script, both rows in USE Adventure Works2012; GO IF OBJECT_ID ('dbo. The Database Engine converts a partial update to a full update when the UPDATE statement causes either of these actions: are specified in bytes for varbinary and varchar data types and in characters for the nvarchar data type.
Any characters not found in this code page are lost.
DEFAULT Specifies that the default value defined for the column is to replace the existing value in the column.
Use the @@ROWCOUNT function to return the number of inserted rows to the client application. Avoid using these data types in new development work, and plan to modify applications that currently use them.
For more information, see @@ROWCOUNT (Transact-SQL). Variable names can be used in UPDATE statements to show the old and new values affected, but this should be used only when the UPDATE statement affects a single record. Use nvarchar(max), varchar(max), and varbinary(max) instead. ) clause to perform a partial or full update of varchar(max), nvarchar(max), and varbinary(max) data types.