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CARDINALITY
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The CARDINALITY function allows for getting the size of an array.
SELECT CARDINALITY(ARRAY[1, 2])
create.select(cardinality(array(1, 2))).fetch();
The result would look like this:
+-------------+ | cardinality | +-------------+ | 2 | +-------------+
Dialect support
This example using jOOQ:
cardinality(array(1, 2))
Translates to the following dialect specific expressions:
Aurora Postgres, H2, HSQLDB, Postgres, Trino, YugabyteDB
cardinality(ARRAY[1, 2])
BigQuery, DuckDB
array_length(ARRAY[1, 2])
ClickHouse
length(ARRAY(1, 2))
ASE, Access, Aurora MySQL, CockroachDB, DB2, Derby, Exasol, Firebird, Hana, Informix, MariaDB, MemSQL, MySQL, Oracle, Redshift, SQLDataWarehouse, SQLServer, SQLite, Snowflake, Sybase, Teradata, Vertica
/* UNSUPPORTED */
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