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LISTAGG (SQL standard feature T625)

listagg allows to concatenate strings in an select statement with a group-by clause.

Various vendors implemented listagg with differing names.

Mansas Kumar has provided a very nice comparison of the implementation of listagg for various database vendors in this Stackoverflow answer. The gist of the answer is:

Vendor	function
Oracle	`listagg`
DB2	`listagg`
SQL Server (>= 2017)	`string_agg`
PostgreSQL	`string_agg`
SQLite	`group_concat`
MySQL	`group_concat`

LISTAGG (SQL standard feature T625)

See also