Creating Unions That Join : Union « Select Clause « SQL / MySQL

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SQL / MySQL » Select Clause » Union 
Creating Unions That Join
   
mysql>
mysql> CREATE TABLE Books
    -> (
    ->     BookID SMALLINT NOT NULL PRIMARY KEY,
    ->     BookTitle VARCHAR(60NOT NULL,
    ->     Copyright YEAR NOT NULL
    -> )
    -> ENGINE=INNODB;
Query OK, rows affected (0.00 sec)

mysql>
mysql> INSERT INTO Books VALUES
    -> (12786'Notebook', 1934),
    -> (13331'C++', 1919),
    -> (14356'Opera', 1966),
    -> (15729'Sql Server', 1932),
    -> (16284'C'1996),
    -> (17695'Pascal', 1980),
    -> (19264'Postcards', 1992),
    -> (19354'Oracle', 1993);
Query OK, rows affected (0.00 sec)
Records: 8  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> CREATE TABLE Authors
    -> (
    ->     AuthID SMALLINT NOT NULL PRIMARY KEY,
    ->     AuthFN VARCHAR(20),
    ->     AuthMN VARCHAR(20),
    ->     AuthLN VARCHAR(20)
    -> )
    -> ENGINE=INNODB;
Query OK, rows affected (0.00 sec)

mysql>
mysql> INSERT INTO Authors VALUES
    -> (1006'Hunter', 'S.', 'Thompson'),
    -> (1007'Joyce', 'Carol', 'Oates'),
    -> (1008'Black', NULL, 'Elk'),
    -> (1009'Rainer', 'Maria', 'Rilke'),
    -> (1010'John', 'Kennedy', 'Toole'),
    -> (1011'John', 'G.', 'Neihardt'),
    -> (1012'Annie', NULL, 'Proulx'),
    -> (1013'Alan', NULL, 'Watts'),
    -> (1014'Nelson', NULL, 'Algren');
Query OK, rows affected (0.00 sec)
Records: 9  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql> CREATE TABLE AuthorBook
    -> (
    ->     BookID SMALLINT NOT NULL,
    ->     AuthID SMALLINT NOT NULL,
    ->     PRIMARY KEY (AuthID, BookID)
    -> )
    -> ENGINE=INNODB;
Query OK, rows affected (0.01 sec)

mysql>
mysql> INSERT INTO AuthorBook VALUES
    -> (100614356),
    -> (100815729),
    -> (100912786),
    -> (101017695),
    -> (101115729),
    -> (101219264),
    -> (101219354),
    -> (101416284);
Query OK, rows affected (0.00 sec)
Records: 8  Duplicates: 0  Warnings: 0

mysql>
mysql>
mysql>
mysql> CREATE TABLE Authors2
    -> (
    ->     AuthID SMALLINT NOT NULL PRIMARY KEY,
    ->     AuthFN VARCHAR(20),
    ->     AuthMN VARCHAR(20),
    ->     AuthLN VARCHAR(20)
    -> );
Query OK, rows affected (0.01 sec)

mysql>
mysql> INSERT INTO Authors2 VALUES
    -> (1006'Mark', NULL, 'Twain'),
    -> (2205'E.', 'M.', 'Forster'),
    -> (2206'Gabriel', 'Garcia', 'Marquez'),
    -> (2207'Raymond', NULL, 'Carver'),
    -> (2208'Mary', NULL, 'Shelley'),
    -> (2209'Albert', NULL, 'Camus');
Query OK, rows affected (0.00 sec)
Records: 6  Duplicates: 0  Warnings: 0

mysql>
mysql> SELECT AuthFN, AuthMN, AuthLN FROM Authors
    -> UNION
    -> SELECT AuthFN, AuthMN, AuthLN FROM Authors2;
+---------+---------+----------+
| AuthFN  | AuthMN  | AuthLN   |
+---------+---------+----------+
| Hunter  | S.      | Thompson |
| Joyce   | Carol   | Oates    |
| Black   | NULL    | Elk      |
| Rainer  | Maria   | Rilke    |
| John    | Kennedy | Toole    |
| John    | G.      | Neihardt |
| Annie   | NULL    | Proulx   |
| Alan    | NULL    | Watts    |
| Nelson  | NULL    | Algren   |
| Mark    | NULL    | Twain    |
| E.      | M.      | Forster  |
| Gabriel | Garcia  | Marquez  |
| Raymond | NULL    | Carver   |
| Mary    | NULL    | Shelley  |
| Albert  | NULL    | Camus    |
+---------+---------+----------+
15 rows in set (0.00 sec)

mysql>
mysql>
mysql> drop table Books;
Query OK, rows affected (0.00 sec)

mysql> drop table Authors;
Query OK, rows affected (0.00 sec)

mysql> drop table Authors2;
Query OK, rows affected (0.00 sec)

mysql> drop table AuthorBook;
Query OK, rows affected (0.00 sec)

mysql>

   
    
    
  
Related examples in the same category
1.How many of those states joined the Union in the 19th century?
2.Count how many states joined the Union on each day of the week, grouped by day name, the results will be sorte
3.Which states joined the Union in the same year as New York?
4.To select all records, including duplicates, follow the first UNION keyword with ALL
5.Sort the result set in a specific order with Union.
6.Joining Results with UNION
7.The sorting is performed on the entire UNION. If you just want to sort the second SELECT, you'd need to use pa
8.UNION does not return duplicate results (similar to the DISTINCT keyword).
9.Union columns from different tables
10.Sort data then do the union (ERROR 1221 (HY000): Incorrect usage of UNION and ORDER BY)
11.Union with sorted data
12.Put branket for union
13.Union the same tables
14.Union start dates and end dates
15.Union the subquery
16.Alias the union tables in subquery
17.Union constant values
18.Union numbers
19.Union the result of sum() aggregate function
20.Limit then union
21.Union grouped value
22.Union all
23.Using Union for subquery
24.Union constant value
25.Insert with union result
26.Create view for union
27.Create view for union constants
28.Display all data in "ps_games", "xbox_games" and "cube_games" as a single result set
29.Selecting Records in Parallel from Multiple Tables
30.To select a single winner from each table and combine the results
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