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SQL Anywhere 11.0.0 » SQL Anywhere Server - SQL Reference » Using SQL » SQL data types » Data type conversions

 

Converting NULL constants to NUMERIC and string types

When converting a NULL constant to a NUMERIC, or to a string type such as CHAR, VARCHAR, LONG VARCHAR, BINARY, VARBINARY, and LONG BINARY the size is set to 0. For example:

SELECT CAST( NULL AS CHAR ) returns CHAR(0)

SELECT CAST( NULL AS NUMERIC ) returns NUMERIC(1,0)