In SQL, a view is a virtual table based on the result set of an SQL statement.The CREATE VIEW command creates a view.The following SQL creates a view that selects all customers from Brazil:ExampleGet your own SQ
SQL Dropping a View A view is deleted with theDROP VIEWstatement. SQL DROP VIEW Syntax DROPVIEWview_name; The following SQL drops the "Brazil Customers" view: Example DROPVIEW[Brazil Customers]; Track your progress - it's free! Log inSign Up...
←SQL AUTO INCREMENT 字段SQL Server 和 MySQL 中的 Date 函数→ SQL CREATE VIEW、REPLACE VIEW、 DROP VIEW 语句 SQL 视图(Views) 视图是可视化的表。 本章讲解如何创建、更新和删除视图。 SQL CREATE VIEW 语句 在SQL 中,视图是基于 SQL 语句的结果集的可视化的表。 视图包含行和列,就像一个真实的表。
SQL 视图(Views) 视图是可视化的表。 本章讲解如何创建、更新和删除视图。 SQL CREATE VIEW 语句 在 SQL 中,视图是基于 SQL 语句的结果集的可视化的表。 视图包含行和列,就像一个真实的表。视图中的字段就是来自一个或多个数据库中的真实的表中的字段。 您可以向视图
DROP VIEW (Transact-SQL) Removes one or more views from the current database. DROP VIEW can be executed against indexed views. When you drop a view, the definition of the view and other information about the view is deleted from the system catalog. All permissions for the view are also ...
DROP VIEW语句用来删除一个或多个视图。 1>.查看DROP VIEW的帮助信息 mysql> ? DROP VIEW 2>.同样,RESTRICT/CASCADE两个关键词在MySQL5.7依旧也是无效 mysql>SHOW TABLES;+---+|Tables_in_A3|+---+|v_B3|+---+1rowinset(0.00sec) mysql>mysql>DROPVIEWv_B3; Query OK,0rows affected...
A view is a virtual table. This chapter shows how to create, update, and delete a view. SQL CREATE VIEW Statement In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are ...
DROP [ MATERIALIZED ] VIEW [ IF EXISTS ] view_name 参数 示例 SQL -- Assumes a view named `employeeView` exists.>DROPVIEWemployeeView;-- Assumes a view named `employeeView` exists in the `usersc` schema>DROPVIEWusersc.employeeView;-- Assumes a view named `employeeView` does not exist....
| view | +---+ 6 rows in set (0.00 sec) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. mysql>#进入数据库 view # mysql> USE view; Database changed 1. 2. 3. 2、删除名为 selectproduct 的视图 mysql>查看数据库 view 中视图...
<drop_view_statement>::= DROP VIEW [<cascade_option>] Examples SQL Tutorial,View Tables Explanation The table name must identify an existing view table. The database user must be the owner of the specified view table or have theDROPINprivilege for theschemato which the view table is assig...