SET Data Type

String object with zero or more values from a predefined list. A SET column can store multiple values selected from a list of permitted strings.

Syntax

SET('value1','value2',...) [CHARACTER SET charset_name] [COLLATE collation_name]

Description

A set. A string object that can have zero or more values, each of which must be chosen from the list of values 'value1', 'value2', ... A SET column can have a maximum of 64 members. SET values are represented internally as integers.

SET values cannot contain commas.

If a SET contains duplicate values, an error will be returned if strict mode is enabled, or a warning if strict mode is not enabled.

EXAMPLES

CREATE TABLE set_example (
  description VARCHAR(20),
  example SET('Foo', 'Bar', 'Baz', 'Bob')
);

INSERT INTO set_example VALUES
  ('1 val', 'Foo'),
  ('2 vals', 'Baz,Foo'),
  ('4 vals', 'Bob,Foo,Bar,Foo,Baz,Bob');

SELECT * FROM set_example;

+-------------+-----------------+
| description | example         |
+-------------+-----------------+
| 1 val       | Foo             |
| 2 vals      | Foo,Baz         |
| 4 vals      | Foo,Bar,Baz,Bob |
+-------------+-----------------+

See Also

• Character Sets and Collations

• Data Type Storage Requirements

_{This page is licensed: GPLv2, originally from fill_help_tables.sql}