------------------case---when-------的使用---------------------

select? userAccount , eatingDate ,
?? ?case when sum(a)=1 then'早餐' else '' end?? as 'breakfast' ,
?? ?case when sum(b)=1 then '午餐' else '' end? as 'lunch',
?? ?case when sum(c)=1 then '晚餐' else '' end? as 'dinner'
?? ?from (
?? ??? ?select? userAccount , eatingDate ,
?? ??? ??? case when menuType='早餐' then 1 else 0 end? AS a ,
?? ??? ??? case when menuType='午餐' then 1 else 0 end? AS b ,
?? ??? ??? case when menuType='晚餐' then 1 else 0 end? AS c
?? ??? ?from view_menuReservation
?? ??? ??? where userAccount = '7923'
?? ??? ??? and eatingDate between '2016-12-01' and'2016-12-31'
?? ?) t ?
?? ?group by userAccount ,eatingDate
??? order by eatingDate asc

---------------------查詢的時候嵌套子查詢-----------------------------------------

SELECT tb.account, '2016-10'? month,
??? ( max(CASE signStatus WHEN '準時' THEN total ELSE 0 END )+
?? ? max(CASE signStatus WHEN '調休' THEN total ELSE 0 END)+
?? ? max(CASE signStatus WHEN '遲到' THEN total ELSE 0 END)
?? ? ) sumDay,
??? (max(CASE signStatus WHEN '準時' THEN total ELSE 0 END)
?? + max(CASE signStatus WHEN '調休' THEN total ELSE 0 END)) onTime,
???? max(CASE signStatus WHEN '遲到' THEN total ELSE 0 END) late,
???? max(CASE signStatus WHEN '請假' THEN total ELSE 0 END) leave,
???? max(CASE signStatus WHEN '早退' THEN total ELSE 0 END) absenteeism,
??? ( select count(*) from tb_workAttendance
where workStatus='加班' and
docdate between '2016-10-1' and '2016-10-31' and account = tb.account and signType='上班'? group by workStatus) overtime,
?? ?0 dayOff,
?? ?(select sum (totalHour) totalHour? from tb_restApply where? docdate between '2016-11-01' and '2016-11-30' and account=tb.account group by account) totalHour
???? from(
???? select count(1) total, signStatus, account
???? from tb_workAttendance
???? where docdate between '2016-10-1' and '2016-10-31'
???? group by signStatus,account)
???? tb
???? group by account

?

----------------------sql循環-------------------------------------------------------------

?declare @Num int;


set @Num = 1 ;
while @Num< 10
BEGIN
?? ?select '1';
?? ?set @Num = @Num +1 ;
END

-----------------T sql--------批量處理修改數據 數據來源別的關聯表------------------------------

?update GL_Journal? set madedate=b.madedate? from
(select madedate,id,accountingperiod?? from GL_Doc where maker ='admin' and accountingperiod ='12'? ) b
inner join GL_Journal a on a.docid =b.id

?-------------------------------------------------------數據表格的備份

select * into dddd from aaaa

?

轉載于:https://www.cnblogs.com/cl1006/p/6241067.html

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