Use the BIT data type for storing Boolean values.
Data type  | 
Values  | 
Supported by  | 
|---|---|---|
BIT  | 
0 or 1  | 
SQL Anywhere and Adaptive Server  | 
BIT stores only the values 0 or 1.
Inserting any nonzero value into a BIT column stores a 1 in the column. Inserting any zero value into a BIT column stores a 0.
Only the default index type is supported for BIT data.