CONCAT()

This function returns a string resulting from the concatenation, or joining, of two or more string values in an end-to-end manner.

Signature

CONCAT ( argument1 , argument2 [ , argumentN ] ... )

Examples

SELECT CONCAT('key', 'board', NULL) AS joined;

joined
--------
keyboard

SELECT CONCAT ('Happy ', 'Birthday ', 11, '/', '25') AS Result;

Happy Birthday 11/25

Run against SQL Server 16.0.4265.3 on 2026-09-13. This is the output we got, not the documentation’s.

Available on

SQL Server 2017 and later
Azure SQL Database
Azure SQL Managed Instance
Azure Synapse Analytics
Analytics Platform System (PDW)
Microsoft Fabric warehouse
Fabric SQL database

Signature and description adapted from the Microsoft SQL documentation, used under the CC BY 4.0. SQL Server and Azure are trademarks of the Microsoft group of companies. This page is not affiliated with Microsoft.