sql實現從兩個表擷取欄位組成表資料再插入到函數表中,sql欄位
實現此效果說起來比較難以說明,我這裡還是先將實現的效果已圖的形式展示一下吧。
這是兩個表的設計。我想實現的效果舉個例子,以查詢secretaryCharge為例:
點擊“市級”,我將查詢到市級一下所有“區級”的secretaryCharge數目,並通過organizations中的fullName來作為名字,查到的統計數目作為值。得到的效果便是如所示:
具體實現sql語句就是用到join on,sql語句具體如下:
insert @result(fullName,paramer)(select fullName,villageCharge from (select fullName,orgID from organizations where parent=@orgId) as orgInfojoin(select DJCharge.parentOrg as parent ,sum(villageCharge) as villageChargefrom DJCharge,organizations where year=@year and DJCharge.orgID=organizations.orgID and DJCharge.parentOrg in(select distinct orgID from organizations where parent=@orgID)group by DJCharge.parentOrg) as DJChargeInfoon orgInfo.orgID=DJChargeInfo.parent )
這裡我省略了定義、聲明等過程,此段代碼是begin-end塊中的。用了groupby,不用的話則會統計總數,而不能將子查詢分開統計。
如果需要統計一個表中的多個欄位統計數,join-on還可以繼續使用,代碼例子如下所示:
insert @result (regionFullName,countmale,countfemale)( select fullName,countmale,countfemale from (select fullName,orgID from organizations where parent=@orgID) as orgInfofull 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 parent=@orgID) group by substring(parentOrg,2,6))as Maleon 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 parent=@orgID) group by substring(parentOrg,2,6))as Femaleon substring(orgInfo.orgID,2,6)=Female.parent )
這裡我用了full join全串連,目的是在顯示時只要組成的表中有一個欄位有值,這一行都得到。查詢效果如下:
如果不使用全串連可能會產生多餘兩行結果。
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