SQLServer查詢本週
sql 查詢本週本月問題
---求相差天數
select datediff(day,'2004-01-01',getdate())
--1.一個月第一天的
Select DATEADD(mm, DATEDIFF(mm,0,getdate()), 0)
--2.本週的星期一
Select DATEADD(wk, DATEDIFF(wk,0,getdate()), 0)
select dateadd(wk,datediff(wk,0,getdate()),6)
--3.一年的第一天
Select DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)
--4.季度的第一天
Select DATEADD(qq, DATEDIFF(qq,0,getdate()), 0)
--5.當天的半夜
Select DATEADD(dd, DATEDIFF(dd,0,getdate()), 0)
--6.上個月的最後一天
Select dateadd(ms,-3,DATEADD(mm, DATEDIFF(mm,0,getdate()), 0))
--7.去年的最後一天
Select dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate()), 0))
--8.本月的最後一天
Select dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))
--9.本年的最後一天
Select dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0))
--10.本月的第一個星期一
select DATEADD(wk,
DATEDIFF(wk,0,dateadd(dd,6-datepart(day,getdate()),getdate())), 0)
--查詢本週註冊人數
select count(*) from [user]
where datediff(week,create_day-1,getdate())=0
--上週註冊人數
select count(*) from [user]
where datediff(week,create_day-1,getdate())=1
--本月註冊人數
select count(*) from [user]
where datediff(month,create_day,getdate())=0
--上月註冊人數
select count(*) from [user]
where datediff(month,create_day,getdate())=1
--如果要效率,這樣寫查詢
--查詢本週註冊人數
select count(*) from [user]
where create_day>=dateadd(day,2-datepart(weekday,getdate()),convert(varchar,getdate(),112))
and create_day
--上週註冊人數
select count(*) from [user]
where create_day>=dateadd(day,-5-datepart(weekday,getdate()),convert(varchar,getdate(),112))
and create_day
--本月註冊人數
select count(*) from [user]
where create_day>=dateadd(day,1-day(getdate()),convert(varchar,getdate(),112))
and create_day
--上月註冊人數
select count(*) from [user]
where create_day>=dateadd(month,-1,dateadd(day,1-day(getdate()),convert(varchar,getdate(),112)))
and create_day
--本週
select count(*) from User
where datediff(dd,create_day,getdate()) <= datepart(dw,getdate())
--上週
select count(*) from User
where datediff(dd,create_day,(getdate() - datepart(dw,getdate()))) <= 7
--本月
select count(*) from User
where datepart(mm,create_day) = datepart(mm,getdate())
--上月
select count(*) from User
where datepart(mm,create_day) = datepart(mm,getdate()) - 1
--本週
select count(*) from [User]
where datediff(dd,create_day,getdate()) <= datepart(dw,getdate())
--上週
select count(*) from [User]
where datediff(dd,create_day,(getdate() - datepart(dw,getdate()))) <= 7
--本月
select count(*) from [User]
where datepart(mm,create_day) = datepart(mm,getdate())
--上月
select count(*) from [User]
where datepart(mm,create_day) = datepart(mm,getdate()) - 1
學習
month(create_day)=month(getdate())本月
month(create_day)=month(getdate())-1 上月
補充 查詢今日所有的
Select * from feedback Where (DATEDIFF(d,fedtime,GETDATE())=0) orDER BY fedid DESC