CONCAT_WS() Function in SQL Server

CONCAT_WS() :
This function concatenates two or more strings together with a separator.

Syntax :

CONCAT_WS(separator, input_string1, input_string2, [...input_stringN]);

Parameter :
This method accepts two-parameters as mentioned above and described below as follows.

• separator –
  It is an expression of any character type like char, nchar, nvarchar, or varchar.
• input_string –
  It is an expression of any type. The input_strings to add together.

Returns :
It returns a concatenated string value.

Example-1 :
Use ‘ – ‘ to separate the concatenated string values.

SELECT CONCAT_WS(' - ', 'GeeksforGeeks', 'computer', 'science', 'portal');

Output :

GeeksforGeeks - computer - science - portal

Example-2 :
Use ‘ ‘ to separate the concatenated string values.

SELECT CONCAT_WS(' ', 'Hardik', 'Pandya') Your_Name;

Output :

Your_Name
Hardik Pandya

Example-3 :
Using CONCAT_WS() with NULL values.

SELECT CONCAT_WS(', ','DN Block', 'Bidhannagar', 
                      NULL, 'Kolkata', NULL, 700091) 
AS Your_Address;

Output :

Your_Address
DN Block, Bidhannagar, Kolkata, 700091

Example-4 :
Using CONCAT_WS() with table columns.
Table -Player_Details –

PLAYERID	PLAYERNAME	NICKNAME
45	Rohit Sharma	Hit Man
18	Virat Kohli	Chiku
7	MS Dhoni	MSD

SELECT 
    PLAYERNAME, 
    NICKNAME, 
    CONCAT_WS(' - ', PLAYERNAME, NICKNAME) Name_with_NickName
FROM 
    Player_Details

Output :

PLAYERNAME	NICKNAME	Name_with_NickName
Rohit Sharma	Hit Man	Rohit Sharma – Hit Man
Virat Kohli	Chiku	Virat Kohli – Chiku
MS Dhoni	MSD	MS Dhoni – MSD