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NVL
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The NVL() function (or also the ISNULL() or IFNULL() functions) produces the first argument if it is NOT NULL, otherwise the second argument. It is a special case of the COALESCE function, which takes any number of arguments.
SELECT nvl(null, 1);
create.select(nvl(null, 1)).fetch();
The result being
+-----+ | nvl | +-----+ | 1 | +-----+
Dialect support
This example using jOOQ:
nvl(null, 1)
Translates to the following dialect specific expressions:
Access
iif(NULL IS NULL, 1, NULL)
ASE, Aurora Postgres, CockroachDB, DuckDB, Exasol, Firebird, Hana, Postgres, Redshift, SQLDataWarehouse, SQLServer, Snowflake, Sybase, Teradata, Trino, Vertica, YugabyteDB
coalesce( NULL, 1 )
Aurora MySQL, BigQuery, ClickHouse, MariaDB, MemSQL, MySQL, SQLite
ifnull( NULL, 1 )
DB2, H2, HSQLDB, Informix, Oracle
nvl( NULL, 1 )
Derby
coalesce( ?, 1 )
Generated with jOOQ 3.20. Translate your own SQL on our website
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