doris/docs/en/sql-manual/sql-functions/string-functions/concat.md

title, language

title	language
concat	en

concat

Description

Syntax

VARCHAR concat (VARCHAR,...)

Connect multiple strings and return NULL if any of the parameters is NULL

example

mysql> select concat("a", "b");
+------------------+
| concat('a', 'b') |
+------------------+
| ab               |
+------------------+

mysql> select concat("a", "b", "c");
+-----------------------+
| concat('a', 'b', 'c') |
+-----------------------+
| abc                   |
+-----------------------+

mysql> select concat("a", null, "c");
+------------------------+
| concat('a', NULL, 'c') |
+------------------------+
| NULL                   |
+------------------------+

keyword

CONCAT