concat.md

title
CONCAT

Returns the string that results from concatenating the arguments. May have one or more arguments. If all arguments are nonbinary strings, the result is a nonbinary string. If the arguments include any binary strings, the result is a binary string. A numeric argument is converted to its equivalent nonbinary string form.

Syntax

CONCAT(<expr1>, ...)

Arguments

Arguments	Description
<expr1>	string

Return Type

A VARCHAR data type value Or NULL data type.

Examples

SELECT CONCAT('data', 'bend');
+------------------------+
| concat('data', 'bend') |
+------------------------+
| databend               |
+------------------------+

SELECT CONCAT('data', NULL, 'bend');
+------------------------------+
| CONCAT('data', NULL, 'bend') |
+------------------------------+
|                         NULL |
+------------------------------+

SELECT CONCAT('14.3');
+----------------+
| concat('14.3') |
+----------------+
| 14.3           |
+----------------+