using tablename as alias DELETE FROM tv_episodes USING tv_episodes AS ed LEFT OUTER JOIN data AS nd ON ed.file_name = nd.file_name ...
using tablename as alias DELETE FROM tv_episodes USING tv_episodes AS ed LEFT OUTER JOIN data AS nd ON ed.file_name = nd.file_name ...
代碼如下 ...
delete (別名) from tblA (別名) left join tblb (別名) on。。。用法 1、創建使用的表及數據 2、delete from left join ...
UPDATE:UPDATE A SET ApproverID=NULL FROM [SH_MaterialApplyBuyBill] A LEFT JOIN [SH_MaterialApplyBuyBillDetail] B ON A.ID=B.[MaterialApplyBuyBillID ...
Delete from Table From Table inner join TableOther On Table.Id=TableOther.Id 注意上面是兩個From View Code ...
表連接算法 Nested Loop Join(NLJ)算法: 首先介紹一種基礎算法:NLJ,嵌套循環算法。循環外層是驅動表,循壞內層是被驅動表。驅動表會驅動被驅動表進行連接操作。首先驅動表找到第一條記錄,然后從頭掃描被驅動表,逐一查找與驅動表第一條記錄匹配的記錄然后連接起來形成結果表中的一條記 ...
t-sql Update XXX set XXX where 這種寫法大家都知道, 這里update和delete支持inner join的update 的定法 update tb_Userset pass=''from tb_User usrinner join tb_Address ...