CONCAT_WS() FUNCTION The MySQL CONCAT_WS function is used to concatenate two or more expressions together. It also allows to add a separator between each of the concatenated expressions. The various versions of MySQL support the CONCAT_WS function, namely, MySQL 5.7, MySQL 5.6, MySQL 5.5, MySQL 5.1, MySQL 5.0, MySQL 4.1, MySQL 4.0 and MySQL 3.23.
Syntax:
CONCAT_WS( separator, expr_1, expr_2, ... expr_n )
Parameters:
separator: It is used to specify the separator to add. expr_1, expr_2, … expr_n: It is used to specify the expressions to concatenate.
Example 1:
mysql> SELECT CONCAT_WS (‘,’, 1, 7, 9, 67);
Output:
‘1, 7, 9, 67’
Explanation:
The expressions are concatenated with the separator ‘,’.
Example 2:
mysql> SELECT CONCAT_WS (‘_’, ‘apple’, ‘boy’, ‘cat’, ‘dog’);
Output:
‘apple_boy_cat_dog’
Explanation:
The expressions are concatenated with the separator ‘_’.
