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SQL Anywhere 11.0.0 » SQL Anywhere Server - SQL Reference » Using SQL » SQL functions » Alphabetical list of functions

 

COALESCE function [Miscellaneous]

Returns the first non-NULL expression from a list. This function is identical to the ISNULL function.

Syntax
COALESCE( expression, expression [ , ...] )
Parameters
  • expression   Any expression.

    At least two expressions must be passed into the function, and all expressions must be comparable.

Remarks

The result is NULL only if all the arguments are NULL.

The parameters can be of any scalar type, but not necessarily same type.

For a more detailed description of how the database server processes this function, see ISNULL function [Miscellaneous].

See also
Standards and compatibility
  • SQL/2003   Core feature.

Example

The following statement returns the value 34.

SELECT COALESCE( NULL, 34, 13, 0 );