ST_Union
Applies to ❌ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
This function combines a geometry with another.
create.select(stUnion(
stGeomFromText("POLYGON ((-1 -1, 1 -1, 1 1, -1 1, -1 -1))"),
stGeomFromText("POLYGON ((0 0, 2 0, 2 2, 0 2, 0 0))"),
)).fetch();
The result being, for example
+--------------------------------------------------------------+ | ST_Union | +--------------------------------------------------------------+ | POLYGON ((1 -1, -1 -1, -1 1, 0 1, 0 2, 2 2, 2 0, 1 0, 1 -1)) | +--------------------------------------------------------------+
Or, visually:
Dialect support
This example using jOOQ:
stUnion(geometry1, geometry2)
Translates to the following dialect specific expressions:
Aurora MySQL, Aurora Postgres, DuckDB, MariaDB, MySQL, Postgres, Redshift, Snowflake
st_union(geometry1, geometry2)
CockroachDB
(
SELECT st_union(v)
FROM (
VALUES
(geometry1),
(geometry2)
) t (v)
)
Oracle
sdo_geom.sdo_union(geometry1, geometry2, tol => null)
SQLServer
geometry1.STUnion(geometry2)
ASE, Access, BigQuery, ClickHouse, DB2, Derby, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MemSQL, SQLDataWarehouse, SQLite, Sybase, Teradata, Trino, Vertica, YugabyteDB
/* UNSUPPORTED */
Generated with jOOQ 3.20. Translate your own SQL on our website
Feedback
Do you have any feedback about this page? We'd love to hear it!