表连接 以前学表链接的时候 总感觉有点虚今天就不得不用表链接 想了我半天

分析需求 就是要把 一张表中的数据 通过不同的计算方法得到不同的列 而且 这张表还要和其他的表进行关联

刚开始想这问题时 是怎么也想不出来 也不知道什么原因 竟然弄出来了

select a.hometeamid as team,(select count(*) from match z where z.Status=2 and z.liansaiid=3) as total,
(select count(*) 
from match as d 
where a.hometeamid=d.hometeamid and d.FirstHomeScores + d.SecondHomeScores = 0 or a.hometeamid=d.awayteamid and d.FirstAwayScores + d.SecondAwayScores = 0 ) qwj,
(select count(*) 
from match as e 
where a.hometeamid=e.hometeamid and e.FirstHomeScores  = 0 or a.hometeamid=e.awayteamid and e.FirstAwayScores  = 0 ) qwjs,
(select count(*) 
from match as f 
where a.hometeamid=f.hometeamid and f.SecondHomeScores  = 0 or a.hometeamid=f.awayteamid and f.SecondAwayScores  = 0 ) qwjx,
(select count(*) 
from match as dd 
where a.hometeamid=dd.hometeamid and dd.FirstAwayScores + dd.SecondAwayScores = 0 or a.hometeamid=dd.awayteamid and dd.FirstHomeScores + dd.SecondHomeScores = 0 ) qws,
(select count(*) 
from match as ee 
where a.hometeamid=ee.hometeamid and ee.FirstAwayScores  = 0 or a.hometeamid=ee.awayteamid and ee.FirstHomeScores  = 0 ) qwss,
(select count(*) 
from match as ff 
where a.hometeamid=ff.hometeamid and ff.SecondAwayScores  = 0 or a.hometeamid=ff.awayteamid and ff.SecondHomeScores  = 0 ) qwsx,
(select count(*) from match z where z.Status=2 and z.liansaiid=3)/2 half,
(select count(*) 
from match as b  
where a.hometeamid=b.hometeamid and b.FirstHomeScores + b.SecondHomeScores = 0 ) zwj,
(select count(*) 
from match as g 
where a.hometeamid=g.hometeamid and g.FirstHomeScores  = 0 ) zwjs,
(select count(*) 
from match as h 
where a.hometeamid=h.hometeamid and  h.SecondHomeScores = 0 ) zwjx,
(select count(*) 
from match as bb  
where a.hometeamid=bb.hometeamid and bb.FirstAwayScores + bb.SecondAwayScores = 0 ) zws,
(select count(*) 
from match as gg
where a.hometeamid=gg.hometeamid and gg.FirstAwayScores  = 0 ) zwss,
(select count(*) 
from match as hh 
where a.hometeamid=hh.hometeamid and  hh.SecondAwayScores = 0 ) zwsx,
(select count(*) from match z where z.Status=2 and z.liansaiid=3)/2 half2,
(select count(*) 
from match as c  
where a.hometeamid=c.awayteamid and c.FirstAwayScores + c.SecondAwayScores = 0 ) kwj,
(select count(*) 
from match as i  
where a.hometeamid=i.awayteamid and i.FirstAwayScores = 0 )kwjs,
(select count(*) 
from match as j  
where a.hometeamid=j.awayteamid and  j.SecondAwayScores = 0 ) kwjx,
(select count(*) 
from match as cc 
where a.hometeamid=cc.awayteamid and cc.FirstHomeScores + cc.SecondHomeScores = 0 ) kws,
(select count(*) 
from match as ii  
where a.hometeamid=ii.awayteamid and ii.FirstHomeScores = 0 )kwss,
(select count(*) 
from match as jj  
where a.hometeamid=jj.awayteamid and  jj.SecondHomeScores = 0 ) kwsx
from  match as a 
where a.Status=2 and a.liansaiid=3 
group by a.hometeamid

有些长的吓人把 我去简化下 明天继续 心里太难受了 张琳