SQL语句 CASE WHEN的用法

select Id ,
		case when Id=1 then '等于1'
		when Id >=60 then '大于60'  --注意各结果的数据类型须一致，int和时间等不能转为字符串没出错
		when Id <60 then '小于60'
		else 'ok' end
		AS result ,
		OwnId
from ContentDetectionRecord