sql实现从两个表获取字段组成表数据再插入到函数表中

实现此效果说起来比较难以说明，我这里还是先将实现的效果已图的形式展示一下吧。

这是两个表的设计。我想实现的效果举个例子，以查询secretaryCharge为例：

点击“市级”，我将查询到市级一下所有“区级”的secretaryCharge数目，并通过organizations中的fullName来作为名字，查到的统计数目作为值。得到的效果便是如下图所示：

具体实现sql语句就是用到join on，sql语句具体如下：

insert @result(fullName,paramer)
					(
						select fullName,villageCharge
						from
							(
								select fullName,orgID from organizations where [email protected]
							) as orgInfo
						join
							(
								select DJCharge.parentOrg as parent ,sum(villageCharge) as villageCharge
								from DJCharge,organizations
								where [email protected] and DJCharge.orgID=organizations.orgID
								and DJCharge.parentOrg in(select distinct orgID from organizations where [email protected])group by DJCharge.parentOrg
							) as DJChargeInfo
						on orgInfo.orgID=DJChargeInfo.parent
				   )

这里我省略了定义、声明等过程，此段代码是begin-end块中的。用了groupby，不用的话则会统计总数，而不能将子查询分开统计。

如果需要统计一个表中的多个字段统计数，join-on还可以继续使用，代码例子如下所示：

insert @result (regionFullName,countmale,countfemale)
					(
				        select fullName,countmale,countfemale
				        from

							(
								select fullName,orgID from organizations where [email protected]
							) as orgInfo
							full join
							(

									select count(*) as countmale,SUBSTRING(parentOrg,2,6) AS parent from partyMembers where sex='男'
									and substring(parentOrg ,2,6)in
									( select substring(orgID,2,6) AS validOrgID From organizations where [email protected])
									 group by substring(parentOrg,2,6)
							)as Male
							on substring(orgInfo.orgID,2,6)=Male.parent
							full join
							(
									select count(*) as countfemale,substring(parentOrg,2,6)AS parent from partyMembers where sex='女'
									and substring(parentOrg ,2,6)in
									( select substring(orgID,2,6) AS validOrgID From organizations where [email protected])
									 group by substring(parentOrg,2,6)
							)as Female
						on substring(orgInfo.orgID,2,6)=Female.parent 

					)

这里我用了full join全连接，目的是在显示时只要组成的表中有一个字段有值，这一行都得到。查询效果如下：

如果不使用全连接可能会产生多余两行结果。

版权声明：本文为博主原创文章，未经博主允许不得转载。