Delete rows from multiple tables using a single qu

问题:

This is the query I'm using:

 DELETE TB1.*, TB2.*
   FROM TB1
        INNER JOIN TB2 ON TB1.PersonID = TB2.PersonID 
  WHERE (TB1.PersonID)='2'

It's working fine in MS Access but getting error (Incorrect syntax near ','.) in SQL Server Express 2005.

How to solve it? Please help.

回答1:

You cannot DELETE from multiple tables with a single expression in SQL 2005 - or any other standard SQL for that matter. Access is the exception here.

The best method to get this effect is to specify FOREIGN KEYS between the table with an ON DELETE trigger.

回答2:

Why you don't use a DELETE CASCADE FK ?

回答3:

This cannot be done in one statement. You will have to use 2 statements

DELETE FROM TB1 WHERE PersonID = '2';
DELETE FROM TB2 WHERE PersonID = '2';

回答4:

As i know, you can't do it in a sentence.

But you can build an stored procedure that do the deletes you want in whatever table in a transaction, what is almost the same.

回答5:

I don't think you can delete from multiple tables at once (though I'm not certain).

It sounds to me, however, that you would be best to achieve this effect with a relationship that cascades deletes. If you did this you would be able to delete the record from one table and the records in the other would be automatically deleted.

As an example, say the two tables represent a customer, and the customer's orders. If you setup the relationship to cascade deletes, you could simply delete record in the customer table, and the orders would get deleted automatically.

See the MSDN doc on cascading referential integrity constraints.

回答6:

Specify foreign key for the details tables which references to the primary key of master and set Delete rule = Cascade .

Now when u delete a record from the master table all other details table record based on the deleting rows primary key value, will be deleted automatically.

So in that case a single delete query of master table can delete master tables data as well as child tables data.

回答7:

You can use something like the following:

DECLARE db_cursor CURSOR FOR  
SELECT name 
FROM master.dbo.sysdatabases 
WHERE name IN ("TB2","TB1")  -- use these databases

OPEN db_cursor   
FETCH NEXT FROM db_cursor INTO @name   


WHILE @@FETCH_STATUS = 0   
BEGIN   

       DELETE FROM @name WHERE PersonID ='2'

       FETCH NEXT FROM db_cursor INTO @name   
END  

回答8:

CREATE PROCEDURE sp_deleteUserDetails
    @Email varchar(255)
AS
    declare @tempRegId as int
    Delete UserRegistration where Email=@Email  
    set @tempRegId = (select Id from UserRegistration where Email = @Email)
    Delete UserProfile where RegID=@tempRegId

RETURN 0

回答9:

you can join like this

DELETE t2
   FROM TB1 t1
        INNER JOIN TB2 t2 ON t1.PersonID = t2.PersonID 
  WHERE t1.PersonID = '2'

but as Alex mentioned, only one at a time.

You need cascade constraint on the table to do all at once

回答10:

DELETE TB1, TB2
    FROM customer_details
        LEFT JOIN customer_booking on TB1.cust_id = TB2.fk_cust_id
    WHERE TB1.cust_id = $id

回答11:

Try this query

DELETE TB1, TB2 FROM TB1 INNER JOIN TB2  
WHERE TB1.PersonID = TB2.PersonID and TB1.PersonID = '2'