COALESCE

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

The COALESCE() function produces the first non-NULL value from the variadic list of arguments.

SELECT coalesce(null, null, 1);

create.select(coalesce(null, null, 1)).fetch();

The result being

+----------+
| coalesce |
+----------+
|        1 |
+----------+

Dialect support

This example using jOOQ:

coalesce(null, null, 1)

Translates to the following dialect specific expressions:

-- ACCESS, ASE, AURORA_MYSQL, AURORA_POSTGRES, BIGQUERY, COCKROACHDB, CUBRID, DB2, DERBY, EXASOL, FIREBIRD, H2, HANA, HSQLDB, 
-- IGNITE, INGRES, MARIADB, MEMSQL, MYSQL, ORACLE, POSTGRES, REDSHIFT, SNOWFLAKE, SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, 
-- TERADATA, VERTICA
coalesce(NULL, NULL, 1)

-- INFORMIX
nvl(nvl(NULL, NULL), 1)

(These are currently generated with jOOQ 3.15, see #10141)

The jOOQ User Manual : SQL building : Column expressions : General functions : COALESCE

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