sqlserver isnull(),Count(),sum(),month(getdate()) 的用法
1 select c.PayForYear,c.DptID,c.ZongShu,c.HasPayShu,c.NoPayShu 2 --,d.DepName 3 from ( 4 select PayForYear,DptID 5 ,isnull(Count(PartyMemberID),0) as ZongShu 6 ,isnull(sum(iHasPay),0) HasPayShu, 8 --isnull():PartyMemberID为空返回逗号后面的0 9 --Count():不同PartyMemberID的数目。 10 --sum():字段的总数 值相加 11 case when isnull(Count(PartyMemberID),0) =0 then 0 12 else isnull(isnull(Count(PartyMemberID),0) - isnull(sum(iHasPay),0),0) end 13 NoPayShu 15 from ( 16 select pm.PartyMemberID,pm.DptID,isnull(pfr.PayForYear, year(getdate())) PayForYear, 17 case when pfr.PayForMonth is null then 0 18 when pfr.PayForMonth = month(getdate()) then 1 --当前月份select month(getdate()) 19 else 0 end as iHasPay 20 from partyMember pm 21 left join PartyFeeRecord pfr on (pm.PartyMemberID = pfr.PartyMemberID and pfr.PayForMonth is not null 22 and pfr.PayForMonth = month(getdate()) and isnull(pfr.PayForYear, year(getdate())) = year(getdate())) 23 ) b group by PayForYear,DptID 24 ) c 25 left join Department d on (c.DptID = d.DptID and IsTripAndKH =1 26 ) where c.NoPayShu >0 and d.[Path] like '%P10010012%'
总结:
1:--isnull():PartyMemberID为空返回逗号后面的0; 2: --Count():不同PartyMemberID的数目。; 3: --sum():字段的总数 值相加;
4:--month(getdate()); select month(getdate()) 得出当前月份