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IIF

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

The IIF() function checks if the first argument is TRUE to produce the second argument, or the third argument otherwise. It works in a similar way as the NVL2 function or the CASE expression

SELECT
  iif(1 = 1, 3, 4),
  iif(1 = 2, 3, 4);
create.select(
  iif(inline(1).eq(inline(1)), inline(3), inline(4))
  iif(inline(1).eq(inline(2)), inline(3), inline(4))).fetch();

The result being

+-----+-----+
| iif | iif |
+-----+-----+
|   3 |   4 |
+-----+-----+

Dialect support

This example using jOOQ:

iif(inline(1).eq(inline(2)), inline(3), inline(4))

Translates to the following dialect specific expressions:

Access, SQLServer

iif(1 = 2, 3, 4)

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

CASE
  WHEN 1 = 2 THEN 3
  ELSE 4
END

Aurora MySQL, MariaDB, MemSQL, MySQL

if(1 = 2, 3, 4)

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

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