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
--------------------- 
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