Oracle 查詢父級以及以下的數據 & 刪除父級以及以下的數據

1.  語法格式
        Select * from …. Where [結果過濾條件語句]
                       start with  [and起始條件過濾語句]
                       connect by prior [and中間記錄過濾條件語句]
2.  查找所有下級
        例如： select * from tbl_test start with id=1 connect by prior id=pid

        如此： select t.*, t.rowid  from CM_BUSINESS_CODE t  

                        start with t.business_code ='111'  
                        connect by prior t.business_code = t.super_business_code
注意：此sql能查找id=1的數據的所有下級，寫sql語句時要注意，因爲是從id開始查找下級，所以connect by prior 子句的條件是         id=pid
3.  查找所有上級
       select * from tbl_test start with id=5 connect by prior pid=id
因爲是從id開始查找上級，所以connect by prior 子句的條件是pid=d

 

4. 刪除父級以及以下的數據

delete from
CM_BUSINESS_CODE
where business_code
in
(  select business_code  from CM_BUSINESS_CODE t  start with t.business_code =#{businessCode}
connect by prior t.business_code = t.super_business_code)