foxpro 逻辑型如何判断？

[DebugXP]

SQL 中如何写？
'类型不匹配
select * from t1 where [bol] = 0

'查询结果不正确
select * from t1 where [bol] = 'T'

[十豆三]

select * from t1 where [bol] = .T.

或

select * from t1 where [bol]

[DebugXP]

非常感谢。