3-3-4 enumerated types and collection types

Enumerated types and collection types

Value of the field only in a given range selected, such as radio button, checkbox

enum radio can only choose a value within a given range, such as gender sex male male / female female

multiple choice set within a given range can be selected one or more than one value (1 hobbies, interests 2, 3 ... loving)

MariaDB [db1]> create table consumer( 
    -> name varchar(50),
    -> sex enum('male','female'),
    -> level enum('vip1','vip2','vip3','vip4','vip5'), #在指定范围内，多选一
    -> hobby set('play','music','read','study') #在指定范围内，多选多
    -> );

MariaDB [db1]> insert into consumer values  
    -> ('egon','male','vip5','read,study'),
    -> ('alex','female','vip1','girl');

MariaDB [db1]> select * from consumer;
+------+--------+-------+------------+
| name | sex    | level | hobby      |
+------+--------+-------+------------+
| egon | male   | vip5  | read,study |
| alex | female | vip1  |            |
+------+--------+-------+------------+