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set-nocount-transact-sql.md

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title SET NOCOUNT (Transact-SQL)
description SET NOCOUNT (Transact-SQL)
author WilliamDAssafMSFT
ms.author wiassaf
ms.reviewer pijocoder
ms.date 07/18/2023
ms.service sql
ms.subservice t-sql
ms.topic reference
f1_keywords
NOCOUNT
SET_NOCOUNT_TSQL
NOCOUNT_TSQL
SET NOCOUNT
helpviewer_keywords
NOCOUNT option
number of rows affected by statement
row affected by statements [SQL Server]
counting rows
SET NOCOUNT statement
dev_langs
TSQL
monikerRange =azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current||=fabric

SET NOCOUNT (Transact-SQL)

[!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricdw]

Controls whether a message that shows the number of rows affected by a [!INCLUDEtsql] statement or stored procedure is returned after the result set. This message is an additional result set.

:::image type="icon" source="../../includes/media/topic-link-icon.svg" border="false"::: Transact-SQL syntax conventions

Syntax

SET NOCOUNT { ON | OFF }

[!INCLUDEsql-server-tsql-previous-offline-documentation]

Remarks

When SET NOCOUNT is ON, the count isn't returned. When SET NOCOUNT is OFF, the count is returned.

The @@ROWCOUNT function is updated even when SET NOCOUNT is ON.

SET NOCOUNT ON prevents the sending of DONEINPROC messages to the client for each statement in a stored procedure. For stored procedures that contain several statements that don't return much actual data, or for procedures that contain [!INCLUDEtsql] loops, setting SET NOCOUNT to ON can provide a significant performance boost, because network traffic is greatly reduced.

The setting specified by SET NOCOUNT is in effect at execute or run time and not at parse time.

To view the current setting for this setting, run the following query.

DECLARE @NOCOUNT VARCHAR(3) = 'OFF';
IF ( (512 & @@OPTIONS) = 512 ) SET @NOCOUNT = 'ON';
SELECT @NOCOUNT AS NOCOUNT;

Permissions

Requires membership in the public role.

Examples

The following example prevents the message about the number of rows affected from being displayed. In the following example, "(5 rows affected)" will only be returned to clients from the first SELECT statement.

USE AdventureWorks2022;
GO
SET NOCOUNT OFF;
GO
-- Display the count message.
SELECT TOP(5) LastName
FROM Person.Person
WHERE LastName LIKE 'A%';
GO
-- SET NOCOUNT to ON to no longer display the count message.
SET NOCOUNT ON;
GO
SELECT TOP(5) LastName
FROM Person.Person
WHERE LastName LIKE 'A%';
GO
-- Reset SET NOCOUNT to OFF
SET NOCOUNT OFF;
GO

See also