From a subquery : Sub query « Select Clause « SQL / MySQL

1. SQL / MySQL
2. Select Clause
3. Sub query

From a subquery

       
mysql>
mysql>
mysql>
mysql> CREATE   TABLE MATCHES
    ->         (MATCHNO        INTEGER      NOT NULL,
    ->          TEAMNO         INTEGER      NOT NULL,
    ->          EmployeeNO       INTEGER      NOT NULL,
    ->          WON            SMALLINT     NOT NULL,
    ->          LOST           SMALLINT     NOT NULL,
    ->          PRIMARY KEY    (MATCHNO)            );
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO MATCHES VALUES ( 1, 1,   6, 3, 1);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 2, 1,   6, 2, 3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 3, 1,   6, 3, 0);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 4, 1,  44, 3, 2);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 5, 1,  83, 0, 3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 6, 1,   2, 1, 3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 7, 1,  57, 3, 0);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 8, 1,   8, 0, 3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES ( 9, 2,  27, 3, 2);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES (10, 2, 104, 3, 2);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES (11, 2, 112, 2, 3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES (12, 2, 112, 1, 3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO MATCHES VALUES (13, 2,   8, 0, 3);
Query OK, 1 row affected (0.00 sec)

mysql>
mysql>
mysql>
mysql> CREATE   TABLE PENALTIES
    ->         (PAYMENTNO      INTEGER      NOT NULL,
    ->          EmployeeNO       INTEGER      NOT NULL,
    ->          PAYMENT_DATE   DATE         NOT NULL,
    ->          AMOUNT         DECIMAL(7,2) NOT NULL,
    ->          PRIMARY KEY    (PAYMENTNO)          );
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO PENALTIES VALUES (1,  6, '1980-12-08',100);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (2, 44, '1981-05-05', 75);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (3, 27, '1983-09-10',100);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (4,104, '1984-12-08', 50);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (5, 44, '1980-12-08', 25);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (6,  8, '1980-12-08', 25);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (7, 44, '1982-12-30', 30);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO PENALTIES VALUES (8, 27, '1984-11-12', 75);
Query OK, 1 row affected (0.00 sec)

mysql>
mysql>
mysql>
mysql> SELECT (SELECT   COUNT(*)
    ->         FROM     PENALTIES),
    ->        (SELECT   COUNT(*)
    ->         FROM     MATCHES);
+------------------------------------------------+----------------------------------------------+
| (SELECT   COUNT(*)
        FROM     PENALTIES) | (SELECT   COUNT(*)
        FROM     MATCHES) |
+------------------------------------------------+----------------------------------------------+
|                                              8 |                                           13 |
+------------------------------------------------+----------------------------------------------+
1 row in set (0.00 sec)

mysql>
mysql>
mysql> drop table matches;
Query OK, 0 rows affected (0.00 sec)

mysql> drop table penalties;
Query OK, 0 rows affected (0.00 sec)

   
    
    
    
    
    
    
  

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