SQL Server에서 INNER JOIN을 사용하여 여러 테이블에서 삭제하는 방법

SQL Server에서 INNER JOIN을 사용하여 여러 테이블에서 삭제하는 방법

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MySQL에서는 구문을 사용할 수 있습니다.

DELETE t1,t2 
FROM table1 AS t1 
INNER JOIN table2 t2 ...
INNER JOIN table3 t3 ...

SQL Server에서 동일한 작업을 수행하려면 어떻게합니까?

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이 예에서 "삭제 된"의사 테이블을 활용할 수 있습니다. 다음과 같은 것 :

begin transaction;

   declare @deletedIds table ( id int );

   delete from t1
   output deleted.id into @deletedIds
   from table1 as t1
    inner join table2 as t2
      on t2.id = t1.id
    inner join table3 as t3
      on t3.id = t2.id;

   delete from t2
   from table2 as t2
    inner join @deletedIds as d
      on d.id = t2.id;

   delete from t3
   from table3 as t3 ...

commit transaction;

분명히 '출력 삭제'를 할 수 있습니다. 세 번째 테이블에 대한 조인이 필요한 경우 두 번째 삭제에서도 마찬가지입니다.

참고로 insert 문에 insert. *를 수행하고 update 문에 insert. * 및 deleted. *를 둘 다 수행 할 수도 있습니다.

편집 : 또한 table2 + 3에서 삭제하기 위해 table1에 트리거를 추가하는 것을 고려 했습니까? 당신은 암시 적 트랜잭션 내부에있을 것이고 "inserted. "와 "deleted. "가상 테이블도 사용할 수있을 것입니다.

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1. 항상 테이블 관계에 계단식 삭제를 설정할 수 있습니다.

2. 하나의 저장 프로 시저에서 여러 삭제를 캡슐화 할 수 있습니다.

3. 트랜잭션을 사용하여 하나의 작업 단위를 보장 할 수 있습니다.

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SQL Server의 DELETE에서 FROM 절에 JOIN 구문을 사용할 수 있지만 여전히 첫 번째 테이블에서만 삭제하고 하위 쿼리를 대체하는 독점 Transact-SQL 확장입니다.

여기 예 에서 :

 -- Transact-SQL extension
 DELETE 
   FROM Sales.SalesPersonQuotaHistory 
     FROM Sales.SalesPersonQuotaHistory AS spqh INNER JOIN 
          Sales.SalesPerson AS sp ON spqh.BusinessEntityID = sp.BusinessEntityID
    WHERE sp.SalesYTD > 2500000.00;

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마스터 테이블에서 일부 레코드를 삭제하고 두 세부 테이블에서 해당 레코드를 삭제하는 예 :

BEGIN TRAN

  -- create temporary table for deleted IDs
  CREATE TABLE #DeleteIds (
    Id INT NOT NULL PRIMARY KEY
  )

  -- save IDs of master table records (you want to delete) to temporary table    
  INSERT INTO #DeleteIds(Id)
  SELECT DISTINCT mt.MasterTableId
  FROM MasterTable mt 
  INNER JOIN ... 
  WHERE ...  

  -- delete from first detail table using join syntax
  DELETE d
  FROM DetailTable_1 D
  INNER JOIN #DeleteIds X
    ON D.MasterTableId = X.Id


  -- delete from second detail table using IN clause  
  DELETE FROM DetailTable_2
  WHERE MasterTableId IN (
    SELECT X.Id
    FROM #DeleteIds X
  )


  -- and finally delete from master table
  DELETE d
  FROM MasterTable D
  INNER JOIN #DeleteIds X
    ON D.MasterTableId = X.Id

  -- do not forget to drop the temp table
  DROP TABLE #DeleteIds

COMMIT

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그냥 궁금해 .. 정말 MySQL에서 가능합니까? t1과 t2를 삭제합니까? 아니면 그냥 질문을 오해했습니다.

그러나 여러 조인 조건으로 table1을 삭제하려면 삭제하려는 테이블의 별칭을 지정하지 마십시오.

이:

DELETE t1,t2 
FROM table1 AS t1 
INNER JOIN table2 t2 ...
INNER JOIN table3 t3 ...

MSSQL에서 작동하려면 다음과 같이 작성해야합니다.

DELETE table1
FROM table1 
INNER JOIN table2 t2 ...
INNER JOIN table3 t3 ...

다른 두 개의 일반적인 RDBMS가 삭제 작업을 수행하는 방법을 대조합니다.

http://mssql-to-postgresql.blogspot.com/2007/12/deleting-duplicates-in-postgresql-ms.html

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Basically, no you have to make three delete statements in a transaction, children first and then parents. Setting up cascading deletes is a good idea if this is not a one-off thing and its existence won't conflict with any existing trigger setup.

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In SQL server there is no way to delete multiple tables using join. So you have to delete from child first before delete form parent.

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This is an alternative way of deleting records without leaving orphans.

Declare @user Table(keyValue int  , someString varchar(10))
insert into @user
values(1,'1 value')

insert into @user
values(2,'2 value')

insert into @user
values(3,'3 value')

Declare @password Table(  keyValue int , details varchar(10))
insert into @password
values(1,'1 Password')
insert into @password
values(2,'2 Password')
insert into @password
values(3,'3 Password')

        --before deletion
  select * from @password a inner join @user b
                on a.keyvalue = b.keyvalue
  select * into #deletedID from @user where keyvalue=1 -- this works like the output example
  delete  @user where keyvalue =1
  delete @password where keyvalue in (select keyvalue from #deletedid)

  --After deletion--
  select * from @password a inner join @user b
                on a.keyvalue = b.keyvalue

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All has been pointed out. Just use either DELETE ON CASCADE on the parent table or delete from the child-table to the parent.

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As Aaron has already pointed out, you can set delete behaviour to CASCADE and that will delete children records when a parent record is deleted. Unless you want some sort of other magic to happen (in which case points 2, 3 of Aaron's reply would be useful), I don't see why would you need to delete with inner joins.

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To build upon John Gibb's answer, for deleting a set of data in two tables with a FK relationship:

--*** To delete from tblMain which JOINs to (has a FK of) tblReferredTo's PK  
--       i.e.  ON tblMain.Refer_FK = tblReferredTo.ID
--*** !!! If you're CERTAIN that no other rows anywhere also refer to the 
--      specific rows in tblReferredTo !!!
BEGIN TRAN;

    --*** Keep the ID's from tblReferredTo when we DELETE from tblMain
    DECLARE @tblDeletedRefs TABLE ( ID INT );
    --*** DELETE from the referring table first
    DELETE FROM tblMain 
    OUTPUT DELETED.Refer_FK INTO @tblDeletedRefs  -- doesn't matter that this isn't DISTINCT, the following DELETE still works.
    WHERE ..... -- be careful if filtering, what if other rows 
                --   in tblMain (or elsewhere) also point to the tblReferredTo rows?

    --*** Now we can remove the referred to rows, even though tblMain no longer refers to them.
    DELETE tblReferredTo
    FROM   tblReferredTo INNER JOIN @tblDeletedRefs Removed  
            ON tblReferredTo.ID = Removed.ID;

COMMIT TRAN;

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DELETE     TABLE1 LIN
FROM TABLE1 LIN
INNER JOIN TABLE2 LCS ON  CONDITION
WHERE CONDITION

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$sql="DELETE FROM basic_tbl,education_tbl, personal_tbl ,address_tbl,department_tbl USING basic_tbl,education_tbl, personal_tbl ,address_tbl,department_tbl WHERE b_id=e_id=p_id=a_id=d_id='".$id."' "; $rs=mysqli_query($con,$sql);

참고URL : https://stackoverflow.com/questions/783726/how-do-i-delete-from-multiple-tables-using-inner-join-in-sql-server