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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, HANA, HSQLDB, -- INFORMIX, MARIADB, MEMSQL, MYSQL, ORACLE, POSTGRES, REDSHIFT, SNOWFLAKE, SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, -- TERADATA, TRINO, VERTICA, YUGABYTEDB nullif(1, 2)
(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website
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