Data calculation inside in operator : Sub query « Select Clause « SQL / MySQL






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

Data calculation inside in operator

       
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> SELECT   MATCHNO, WON, LOST
    -> FROM     MATCHES
    -> WHERE    WON IN
    ->         (TRUNCATE(MATCHNO / 2,0), LOST,
    ->         (SELECT   LOST
    ->          FROM     MATCHES
    ->          WHERE    MATCHNO = 1));
+---------+-----+------+
| MATCHNO | WON | LOST |
+---------+-----+------+
|       6 |   1 |    3 |
|       7 |   3 |    0 |
|      12 |   1 |    3 |
+---------+-----+------+
3 rows in set (0.00 sec)

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

mysql>
mysql>
mysql>








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