面试题整理：SQL（二）

Declare @Dup table (TmpDate datetime) 
Declare @minDate datetime,@maxDate datetime 
SELECT @minDate=MIN(StartDate),@maxDate=Max(EndDate) FROM Orders 
WHILE @minDate<=@MaxDate 
BEGIN 
INSERT INTO @Dup VALUES (@minDate) 
SET @minDate=@minDate+1 
END 

SELECT distinct aa.* FROM 
Orders aa INNER JOIN ( 
SELECT Positioncode,tmpdate,count(*) as cnt 
FROM Orders a,@Dup b 
where tmpdate between a.startdate and a.enddate 
group by Positioncode,tmpdate )bb 
ON aa.PositionCode=bb.PositionCode AND bb.tmpDate Between aa.StartDate AND aa.ENdDate 
INNER JOIN Product cc ON bb.PositionCode=cc.PositionCode 
WHERE bb.cnt>cc.showcount
Order by PositionCode

select a.*  from T_GetLargerDebitOccur a  
,(select Occmonth,max(DebitOccur) Debit101ccur from T_GetLargerDebitOccur where AccID=‘101‘ group by Occmonth) b  
where a.Occmonth=b.Occmonth and a.DebitOccur>b.Debit101ccur