Delete records from two tables using JOIN : Join Delete « Join « SQL / MySQL

Home
SQL / MySQL
1.Aggregate Functions
2.Backup Load
3.Command MySQL
4.Cursor
5.Data Type
6.Database
7.Date Time
8.Engine
9.Event
10.Flow Control
11.FullText Search
12.Function
13.Geometric
14.I18N
15.Insert Delete Update
16.Join
17.Key
18.Math
19.Procedure Function
20.Regular Expression
21.Select Clause
22.String
23.Table Index
24.Transaction
25.Trigger
26.User Permission
27.View
28.Where Clause
29.XML
SQL / MySQL » Join » Join Delete 




Delete records from two tables using JOIN

/*

mysql> select * from Authors;
+--------+-----------------+------------------+----------------+
| AuthID | AuthorFirstName | AuthorMiddleName | AuthorLastName |
+--------+-----------------+------------------+----------------+
|   1006 | Henry           | S.               | Thompson       |
|   1007 | Jason           | Carol            | Oak            |
|   1008 | James           | NULL             | Elk            |
|   1009 | Tom             | M                | Ride           |
|   1010 | Jack            | K                | Ken            |
|   1011 | Mary            | G.               | Lee            |
|   1012 | Annie           | NULL             | Watts          |
|   1013 | Alan            | NULL             | Wang           |
|   1014 | Nelson          | NULL             | Yin            |
+--------+-----------------+------------------+----------------+
9 rows in set (0.01 sec)

mysql> DELETE ab, b
    -> FROM Authors AS a, AuthorArticle AS ab, Articles AS b
    -> WHERE a.AuthID=ab.AuthID AND ab.ArticleID=b.ArticleID
    ->    AND AuthorLastName='Henry';
Query OK, 0 rows affected (0.00 sec)

mysql> select * from Authors;
+--------+-----------------+------------------+----------------+
| AuthID | AuthorFirstName | AuthorMiddleName | AuthorLastName |
+--------+-----------------+------------------+----------------+
|   1006 | Henry           | S.               | Thompson       |
|   1007 | Jason           | Carol            | Oak            |
|   1008 | James           | NULL             | Elk            |
|   1009 | Tom             | M                | Ride           |
|   1010 | Jack            | K                | Ken            |
|   1011 | Mary            | G.               | Lee            |
|   1012 | Annie           | NULL             | Watts          |
|   1013 | Alan            | NULL             | Wang           |
|   1014 | Nelson          | NULL             | Yin            |
+--------+-----------------+------------------+----------------+
9 rows in set (0.00 sec)

*/       
Drop table Articles;
Drop table Authors;
Drop table AuthorArticle;



CREATE TABLE Articles (
   ArticleID SMALLINT NOT NULL PRIMARY KEY,
   ArticleTitle VARCHAR(60NOT NULL,
   Copyright YEAR NOT NULL
)
ENGINE=INNODB;


INSERT INTO Articles VALUES (12786'How write a paper', 1934),
                            (13331'Publish a paper', 1919),
                            (14356'Sell a paper', 1966),
                            (15729'Buy a paper', 1932),
                            (16284'Conferences', 1996),
                            (17695'Journal', 1980),
                            (19264'Information', 1992),
                            (19354'AI', 1993);


CREATE TABLE Authors (
   AuthID SMALLINT NOT NULL PRIMARY KEY,
   AuthorFirstName VARCHAR(20),
   AuthorMiddleName VARCHAR(20),
   AuthorLastName VARCHAR(20)
)
ENGINE=INNODB;


INSERT INTO Authors VALUES (1006'Henry', 'S.', 'Thompson'),
                           (1007'Jason', 'Carol', 'Oak'),
                           (1008'James', NULL, 'Elk'),
                           (1009'Tom', 'M''Ride'),
                           (1010'Jack', 'K''Ken'),
                           (1011'Mary', 'G.', 'Lee'),
                           (1012'Annie', NULL, 'Peng'),
                           (1013'Alan', NULL, 'Wang'),
                           (1014'Nelson', NULL, 'Yin');


CREATE TABLE AuthorArticle (
   AuthID SMALLINT NOT NULL,
   ArticleID SMALLINT NOT NULL,
   PRIMARY KEY (AuthID, ArticleID),
   FOREIGN KEY (AuthIDREFERENCES Authors (AuthID),
   FOREIGN KEY (ArticleIDREFERENCES Articles (ArticleID)
)
ENGINE=INNODB;


INSERT INTO AuthorArticle VALUES (100614356)
                              (100815729)
                              (100912786)
                              (101017695),
                              (101115729)
                              (101219264)
                              (101219354)
                              (101416284);
  
select from Authors;

DELETE ab, b
FROM Authors AS a, AuthorArticle AS ab, Articles AS b
WHERE a.AuthID=ab.AuthID AND ab.ArticleID=b.ArticleID
   AND AuthorLastName='Henry';

select from Authors;

           
       














Related examples in the same category
1.Delete command: JOIN two tables
2.Delete with INNER JOIN
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.