Parentheses may be used to group alternations. : Group « Select Clause « SQL / MySQL






  1. SQL / MySQL
  2. Select Clause
  3. Group

Parentheses may be used to group alternations.

      
mysql>
mysql> CREATE TABLE mytable
    -> (
    ->  name    VARCHAR(20)
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO mytable (name)
    ->  VALUES
    ->          ('copper'),
    ->          ('gold'),
    ->          ('iron'),
    ->          ('lead'),
    ->          ('mercury'),
    ->          ('platinum'),
    ->          ('silver'),
    ->          ('tin')
    -> ;
Query OK, 8 rows affected (0.00 sec)
Records: 8  Duplicates: 0  Warnings: 0

mysql>
mysql> SELECT * FROM mytable;
+----------+
| name     |
+----------+
| copper   |
| gold     |
| iron     |
| lead     |
| mercury  |
| platinum |
| silver   |
| tin      |
+----------+
8 rows in set (0.00 sec)

mysql>
mysql>
mysql> SELECT '0m' REGEXP '^[[:digit:]]+|[[:alpha:]]+$';
+-------------------------------------------+
| '0m' REGEXP '^[[:digit:]]+|[[:alpha:]]+$' |
+-------------------------------------------+
|                                         1 |
+-------------------------------------------+
1 row in set (0.00 sec)

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








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