Pluggable View Motivation Design Pluggable View Note: In the context of the Web framework Flask, Pluggable View refers to a different concept. Motivation For some appli...
DROP VIEW 语法说明 语法结构 示例 DROP VIEW 语法说明 DROP VIEW 语句表示删除视图。 如果语法参数列表中命名的任何视图都不存在,则语句报错,并提示无法删除这些不存在的视图,并且不做任何更改。 IF EXISTS 子句表示防止因不存在的视图而发生错误。给出该子句时,将为每个不存在的视图生成一个 N...
DROP VIEW Description Syntax Examples DROP VIEW Description DROP VIEW removes one or more views. If any views named in the argument list do not exist, the statement ...
CREATE VIEW Description Syntax Examples CREATE VIEW Description The view is a virtual table based on the result-set of an SQL statement. A view contains rows and colu...
Materialized View When to use materialized view Advantage Materialized View VS Rollup Use materialized views Create a materialized view Support aggregate functions Update stra...
DROP VIEW Synopsis Description Examples See Also DROP VIEW Synopsis DROP VIEW [ IF EXISTS ] view_name Description Drop an existing view. The optional IF EXISTS cl...
DROP VIEW 语法图 示例 MySQL 兼容性 See also DROP VIEW DROP VIEW 语句用于从当前所选定的数据库中删除视图对象。视图所引用的基表不受影响。 语法图 DropViewStmt TableNameList TableName DropViewStmt ::= 'D...
CREATE VIEW Synopsis Examples MySQL compatibility See also CREATE VIEW The CREATE VIEW statement saves a SELECT statement as a queryable object, similar to a table. Views ...