MySQL CREATE VIEW Examples The following SQL creates a view that shows all customers from Brazil: ExampleGet your own SQL Server CREATEVIEW[Brazil Customers]AS SELECTCustomerName, ContactName FROMCustomers WHERECountry ='Brazil'; We can query the view above as follows: ...
1. Basic View Creation sqlCREATEVIEWcustomer_viewASSELECTfirst_name,last_nameFROMcustomers; This example creates a view named `customer_view` that contains only the `first_name` and `last_name` columns from the `customers` table. 2. View with Filtered Data ...
视图可以使用CREATE VIEW语句创建。CREATE VIEW语句的基本语法如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 CREATEVIEWview_nameASSELECTcolumn1,column2,...FROMtable_nameWHEREcondition; view_name是视图的名称。 column1, column2, ...是视图中要包含的列名。 table_name是要从中选择数据的表名。
例如:如果主机名部分为1.2.example.com,则直接被MySQL忽略, IP地址只能使用通配符组合,而不能与主机名进行组合,否则也会被忽略 。 * 对于指定为IPv4地址的主机名,可以结合子网掩码来控制子网IP数量(注意:子网掩码不使用IPV6),格式:host_ip/netmask。例如:CREATE USER 'david'@'192.51.100.0/255.255.255.0';,...
Write the View name in the‘database_name’.’view_name’format.If you do not specify the database, you might end up creating the View in a different database. Example of MySQL CREATE View or MySQL REPLACE View Statements We want to show only the first name, last name, and gender of...
CREATE PROCEDURE procedure_name([parameters]) BEGIN ··· END; 3、CREATE USER create user 用于向系统中添加新的用户账号 CREATE USER user_name [@hostname] [IDENTIFIED BY [PASSWORD] 'password']; 4、CREATE VIEW create view 用来创建一个或多个表上的新视图 CREATE [OR REPLACE] VIEW view_name...
Create user权限代表允许创建、修改、删除、重命名user的权限 Create view权限代表允许创建视图的权限 Delete权限代表允许删除行数据的权限 Drop权限代表允许删除数据库、表、视图的权限,包括truncate table命令 Event权限代表允许查询,创建,修改,删除MySQL事件 Execute权限代表允许执行存储过程和函数的权限 File权限代...
explain select * from customers where id = 1; explain select * from customers where name = 'john'; explain select * from customers where email = 'john@example.com'; 执行结果中的key列将显示查询使用的索引。如果在key列中看到了索引的名称,表示该索引被查询使用了。 3 创建视图 现在,我们可以使用...
Example1: 单表创建视图 CREATEVIEWv1ASSELECTuser_id, nickname, IF (sex=1,'男','女')assex, user_moneyFROMusersORDERBYuser_moneyDESCLIMIT10;-- question: 该视图不能被更新?updatev1setuser_money=5000whereuser_id=2659; [Err]1288-The targettablev2oftheUPDATEisnotupdatable ...
CREATE VIEW v_today (today) AS SELECT CURRENT_DATE; The following example defines a view that selects two columns from another table as well as an expression calculated from those columns: mysql> CREATE TABLE t (qty INT, price INT); mysql> INSERT INTO t VALUES(3, 50); mysql> CREATE...