使用下列语句,我测试过,没有问题的,time字段要加引号的select 'time', case when 'time' >= cast(left('time',10)+' 12:00:00' as datetime) then null else 'time'end as am,case when 'time' <cast(left('time',10)+' 12:00:00' 展开
使用下列语句,我测试过,没有问题的,time字段要加引号的select 'time', case when 'time' >= cast(left('time',10)+' 12:00:00' as datetime) then null else 'time'end as am,case when 'time' <cast(left('time',10)+' 12:00:00' as datetime) then null else 'time'end as pm from 表 收起