sql 查询之datediff和getdate函数

摘要：可用来获取表中今天、昨天、本周、上周、本月、上月等数据

函数：DATEDIFF ( datepart , startdate , enddate )

• datepare值：year | quarter | month | week | day | hour | minute | second | millisecond
• startdate：开始日期
• enddate ：结束日期
  功能：计算时间差

函数：GetDate()

功能：获取当前的系统时间

表名为tbname,
条件字段名为datename(时间类型的字段)

查询今天

SELECT * FROM tbname where DATEDIFF(day,datename,GETDATE())=0

查询昨天

SELECT * FROM tbname where DATEDIFF(day,datename,GETDATE())=1

查询本周

SELECT * FROM tbname where datediff(week,datename,getdate())=0

查询上周

SELECT * FROM tbname where datediff(week,datename,getdate())=1

查询本月

SELECT * FROM tbname where DATEDIFF(month,datename,GETDATE())=0

查询上月

SELECT * FROM tbname where DATEDIFF(month,datename,GETDATE())=1

查询本季度的

select * from T_InterViewInfo where datediff(QQ,datename,getdate())=0