select case when c1 = 0 then '0' else '1' end as c2 from table
create table testBit ( ids int identity(1,1) primary key, isStudent bit ) insert into testBit select 1 union all select 0 union all select 1 union all select 0 select * from testbit select ids, case when isStudent='0' then '学生' else '不是学生' end as 是否学生 from testbit