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NULLIF

Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

The NULLIF() function produces a NULL value if both its arguments are equal, otherwise it produces the first argument.

SELECT nullif(1, 1), nullif(1, 2);
create.select(nullif(1, 1), nullif(1, 2)).fetch();

The result being

+--------+--------+
| nullif | nullif |
+--------+--------+
|        |      1 |
+--------+--------+

Dialect support

This example using jOOQ:

nullif(1, 2)

Translates to the following dialect specific expressions:

Access

iif(1 = 2, NULL, 1)

ASE, Aurora MySQL, Aurora Postgres, BigQuery, CockroachDB, DB2, Derby, DuckDB, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MariaDB, MemSQL, MySQL, Oracle, Postgres, Redshift, SQLDataWarehouse, SQLServer, SQLite, Snowflake, Sybase, Teradata, Trino, Vertica, YugabyteDB

nullif(1, 2)

(These are currently generated with jOOQ 3.20, see #10141), or translate your own on our website

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