//1、algorithm表示视图选择的算法，undefined表示MySQL自动选择算法；merge表示将使用的视//图语句与视图定义合并起来，使得视图定义的某一部分取代语句对应的部分；temptable表示将//视图的结果存入临时表，然后用临时表来执行语句。//2、[with [cascaded | local] check option]表示视图在更新时保证在视图的权限范围之内//cascaded与local为可选参数，cascaded为默认值，表示更新视图时要满足所有相关视图和表//的条件；local表示更新视图时满足该视图本身定义的条件即可。//3、创建的视图默认属于当前数据库，如果要创建属于其他数据库的视图，则db_name.view_namecreate [or replace] [algorithm = {undefined | merge | temptable}]
view view_name [（column_list）]
as select_statement
[with [cascaded | local] check option]

mysql> create view v_test as select * from test;
Query OK, 0 rows affected (0.00 sec)mysql> select * from v_test;
+----+-------+--------+--------+----------+------+
| id | name  | deptId | salary | t_time   | str  |
+----+-------+--------+--------+----------+------+
|  1 | Lucy  |   NULL |   1000 | 10:28:33 | NULL |
|  2 | Lura  |   NULL |   1200 | 10:28:33 | NULL |
|  3 | Kevin |   NULL |   1500 | 10:28:33 | NULL |
|  4 | Nancy |   NULL |   1000 | 22:08:38 | NULL |
|  5 | Bob   |   NULL |   1200 | 22:08:38 | NULL |
+----+-------+--------+--------+----------+------+
5 rows in set (0.01 sec)mysql> desc v_test;
+--------+-------------+------+-----+---------+-------+
| Field  | Type        | Null | Key | Default | Extra |
+--------+-------------+------+-----+---------+-------+
| id     | int(10)     | NO   |     | 0       |       |
| name   | varchar(25) | NO   |     | NULL    |       |
| deptId | int(11)     | YES  |     | NULL    |       |
| salary | float       | YES  |     | NULL    |       |
| t_time | time        | YES  |     | NULL    |       |
| str    | varchar(4)  | YES  |     | NULL    |       |
+--------+-------------+------+-----+---------+-------+
6 rows in set (0.00 sec)mysql> desc test;
+--------+-------------+------+-----+---------+----------------+
| Field  | Type        | Null | Key | Default | Extra          |
+--------+-------------+------+-----+---------+----------------+
| id     | int(10)     | NO   | PRI | NULL    | auto_increment |
| name   | varchar(25) | NO   |     | NULL    |                |
| deptId | int(11)     | YES  |     | NULL    |                |
| salary | float       | YES  |     | NULL    |                |
| t_time | time        | YES  |     | NULL    |                |
| str    | varchar(4)  | YES  |     | NULL    |                |
+--------+-------------+------+-----+---------+----------------+
6 rows in set (0.00 sec)mysql>

describe / desc view_name;

show table status like 'view_name';

show create view view_name;

select * from information_schema.views;

mysql> select * from information_schema.views where table_name='v_test' \G
*************************** 1. row ***************************TABLE_CATALOG: defTABLE_SCHEMA: mybatisTABLE_NAME: v_testVIEW_DEFINITION: select `mybatis`.`test`.`id` AS `id`,`mybatis`.`test`.`nam
e` AS `name`,`mybatis`.`test`.`deptId` AS `deptId`,`mybatis`.`test`.`salary` AS
`salary`,`mybatis`.`test`.`t_time` AS `t_time`,`mybatis`.`test`.`str` AS `str` f
rom `mybatis`.`test`CHECK_OPTION: NONEIS_UPDATABLE: YESDEFINER: root@localhostSECURITY_TYPE: DEFINER
CHARACTER_SET_CLIENT: gbk
COLLATION_CONNECTION: gbk_chinese_ci
1 row in set (0.00 sec)mysql>

//与创建视图的语句格式一致create [or replace] [algorithm =｛undefined | merge | temptable｝]
view view_name [(column_list)]
as select_statement
[with [cascaded | local] check option] 

alter [algorithm =｛undefined | merge | temptable｝]
view view_name [(column_list)]
as select_statement
[with [cascaded | local] check option]

insert into view_name ...

delete from view_name ...

update view_name set ...

drop view [if exists]view_name [，view_name] ...[restrict | cascade]