| The jOOQ User Manual : SQL building : Column expressions : Aggregate functions : GROUP_CONCAT | previous : next |
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GROUP_CONCAT
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The GROUP_CONCAT() aggregate function is the MySQL version of the standard SQL LISTAGG function, to concatenate aggregate data into a string. It supports being used with an ORDER BY clause, which uses the expected syntax, unlike LISTAGG(), which uses the WITHIN GROUP syntax.
SELECT group_concat(ID), group_concat(ID ORDER BY ID), group_concat(ID SEPARATOR '; '), group_concat(ID ORDER BY ID SEPARATOR '; '), FROM BOOK
create.select(
groupConcat(BOOK.ID),
groupConcat(BOOK.ID).orderBy(BOOK.ID),
groupConcat(BOOK.ID).separator("; "),
groupConcat(BOOK.ID).orderBy(BOOK.ID).separator("; "))
.from(BOOK).fetch();
Producing:
+--------------+--------------+--------------+--------------+ | group_concat | group_concat | group_concat | group_concat | +--------------+--------------+--------------+--------------+ | 1, 3, 4, 2 | 1, 2, 3, 4 | 1; 3; 4; 2 | 1; 2; 3; 4 | +--------------+--------------+--------------+--------------+
Dialect support
This example using jOOQ:
groupConcat(BOOK.ID)
Translates to the following dialect specific expressions:
-- CUBRID, H2, HSQLDB, MARIADB, MYSQL group_concat(BOOK.ID SEPARATOR ',') -- DB2 listagg(BOOK.ID, ',') -- ORACLE listagg(BOOK.ID, ',') WITHIN GROUP (ORDER BY NULL) -- POSTGRES string_agg(CAST(BOOK.ID AS varchar), ',') -- SQLITE group_concat(BOOK.ID, ',') -- SYBASE list(CAST(BOOK.ID AS varchar), ',') -- ACCESS, ASE, AURORA_MYSQL, AURORA_POSTGRES, COCKROACHDB, DERBY, FIREBIRD, HANA, INFORMIX, INGRES, MEMSQL, REDSHIFT, -- SQLDATAWAREHOUSE, SQLSERVER, TERADATA, VERTICA /* UNSUPPORTED */
(These are currently generated with jOOQ 3.14, see #10141)
