[英]complex inner join sql
你是我最后的希望。 我已經花了一整天了,但還沒有決定如何創建此查詢。
這是我當前的數據庫圖
每個存儲都有1個名冊
每個花名冊都由酋長和工人組成。 關於它們的信息在東西表上。
我想做什么? 獲取所有存儲(方形地址),worker_name,worker_surname,Chief_name,Chief_surname。
到目前為止我有什么
select storage_address,
storage_square,
stuffs.stuff_name as chiefSurname,
stuffs.stuff_surname as chiefName from storages
inner join storageRoster on storageRoster.storageRoster_id=storages.storage_roster_id
inner join Chiefs on storageRoster.chief_id = Chiefs.chief_id
inner join stuffs on Chiefs.chief_stuff_id = stuffs.stuff_id
但是在此查詢中,我只能在每個存儲上獲得負責人。 請幫助。 我很絕望。
您需要兩次加入材料表,一次用於工作人員,一次用於負責人:
select storage_address,
storage_square,
cs.stuff_name as chiefSurname,
cs.stuff_surname as chiefName,
ws.stuff_name as workerSurname,
ws.stuff_surname as workerName
from storages
inner join storageRoster on storageRoster.storageRoster_id=storages.storage_roster_id
inner join Chiefs on storageRoster.chief_id = Chiefs.chief_id
inner join stuffs cs on Chiefs.chief_stuff_id = cs.stuff_id
inner join Workers on storageRoster.worker_id = Workers.chief_id
inner join ws cs on Workers.worker_stuff_id = ws.stuff_id
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.