sql相同表不同查询条件合并显示

关键字：FULL JOIN

只要其中某个表存在匹配，FULL JOIN 关键字就会返回行。

 select a.createtime, ISNULL(lp, 0) lp , ISNULL(hp, 0) hp
  from (
     select  convert(nvarchar(10),cCreateTime,23) as createtime,count(iTotalAmount) as lp
     from vat_inv_standard
     where iCharacter = 0 and iStatus = 0 and DateDiff(dd,cCreateTime,getdate())<=7
     group by convert(nvarchar(10),cCreateTime,23)
 ) A FULL JOIN (
     select convert(nvarchar(10),cCreateTime,23) as createtime,count(iTotalAmount) as hp
     from vat_inv_standard
     where iCharacter = 1 and iStatus = 0 and DateDiff(dd,cCreateTime,getdate())<=7
     group by convert(nvarchar(10),cCreateTime,23)
 ) B on  a.createtime =  b.createtime
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 作者：卡尔小布丁
 来源：CSDN
 原文：https://blog.csdn.net/ljh1993531/article/details/80077594 

详细教程：http://www.w3school.com.cn/sql/sql_join_full.asp