[SQL Server] sqlserver set nocount

Syntax: Set nocount {on | off}
The default value is off.

 

When set nocount is off, return the count.

When set nocount is on, no count is returned (indicating the number of rows affected by the transact-SQL statement ).The @ rowcount function is also updated, but the done_in_proc information of each statement in the stored procedure is not sent to the client.When you use a utility provided by Microsoft SQL server to execute a query) "Nn rows affected" is not displayed in the query results at the end ".

 

If some statements contained in the stored procedure do not return much actual data, this setting greatly reduces network traffic and significantly improves performance. 

Set nocount is set during execution or runtime, rather than during analysis.