ASA SQL Reference
  SQL Data Types

BIT data type

Function 

For storing Boolean values (0 or 1).

Syntax 

BIT

Usage 

By default, columns of BIT data type do not allow NULL. This behavior is different from other data types. You can explicitly allow NULL if desired.

Allowed values are 0 and 1.

Standards and compatibility 

• SQL/92    Vendor extension.

• Sybase    Compatible with Adaptive Server Enterprise.