还是UNION 问题，急
select ghrq as rq,count(djh) as sl,max('初诊')as xm from gh_sfdj where ctbz='0' and cf='0' group by ghrq
union select yf_ckdj.rq,count(yf_ckdj.djh) as sl,max('化验人数') as xm from yf_ckdj,xt_sffm where yf_ckdj.fpxm=xt_sffm.bm and xt_sffm.mc like '%化验%' group by yf_ckdj.rq
怎么加个 化验人数/初诊的比率 也是作为 xm
[解决办法]
select cast(化验人数*100/初诊 as nvarchar(20))+'%' as xm
[解决办法]
2/3 显示成字符串，还是66.67%
[解决办法]
select ghrq as rq,count(djh) as sl,max('初诊')as xm from gh_sfdj where ctbz='0' and cf='0' group by ghrq union select yf_ckdj.rq,count(yf_ckdj.djh) as sl,max('化验人数') as xm from yf_ckdj,xt_sffm where yf_ckdj.fpxm=xt_sffm.bm and xt_sffm.mc like '%化验%' group by yf_ckdj.rq union select a.rq,case when a.sl=0 then -1 else b.sl/a.sl end as sl, '化验人数/初诊' as xm from (select ghrq as rq,count(djh) as sl from gh_sfdj where ctbz='0' and cf='0' group by ghrq ) a, (select yf_ckdj.rq,count(yf_ckdj.djh) as sl from yf_ckdj,xt_sffm where yf_ckdj.fpxm=xt_sffm.bm and xt_sffm.mc like '%化验%' group by yf_ckdj.rq ) bwhere a.rq=b.rq