--创建用户 create user lyayzh identified by lyayzh --指定用户使用的表空间 default tablespace lyayzh_test --指定用户使用的临时表空间 temporary tablespace temp; --给用户授予角色 :connect resource grant connect, resource to lyayzh; 插入数据 --向指定表中插入数据 insert into es_product(表中的字段...
一旦用户被创建,我们可以使用以下代码示例将CREATE VIEW权限授予该用户: USEYourDatabaseName;GRANTCREATEVIEWTO[NewUser]; 1. 2. 请将YourDatabaseName替换为你要授予权限的数据库名称,NewUser是你在步骤 1 中创建的用户。 步骤3: 验证用户是否具有 CREATE VIEW 权限 完成以上步骤后,我们可以验证用户是否具有CREATE...
A view could be used from inside a query, a stored procedure, or from inside another view. By adding functions, joins, etc., to a view, it allows you to present exactly the data you want to the user. The sample database Northwind has some views installed by default. The view "Curren...
CREATE VIEW VendorsLocations AS SELECT RTRIM(vend_name)+'('+RTRIM(vend_country) +')' AS vend_title FROM Vendors; 用视图过滤不想要的数据 例子:定义CustomerEMailList视图,它过滤没有电子邮件地址的客户 CREATE VIEW CustomerEMailList AS SELECT cust_id,cust_name,cust_email FROM Custtomers WHERE cust...
1 create view语句介绍 create view语句是将某个查询数据的定义保留下来,以便随时调用,这就是所谓的视图。视图本身不存储查询结果,只是一个定义。 Syntax:CREATE[ORREPLACE] [ALGORITHM={UNDEFINED|MERGE|TEMPTABLE}] [DEFINER={user|CURRENT_USER}] [SQLSECURITY { DEFINER|INVOKER }]VIEWview_name [(column_list)...
A view can be created only in the current database. The CREATE VIEW must be the first statement in a query batch. A view can have a maximum of 1,024 columns. When querying through a view, the Database Engine checks to make sure that all the database objects referenced anywhere in the...
-- PostgreSQL 视图插入数据 CREATE OR REPLACE RULE insert_rule AS ON INSERT TO View_name DO INSTEAD INSERT INTO table_name VALUES ( new.col3, new.col4) 使用视图 SELECT col1, col2_SUM FROM View_name -- 在FROM语句中使用视图名称替代表 删除视图 通用示例 DROP VIEW 视图名称(视图列名1,视图...
Create_View_Statement := 'CREATE' 'VIEW' ['IF' 'NOT' 'EXISTS'] Identifier 'AS' Query_Expression. Remarks Identifier Specifies the name of the view to be defined. If the Identifier is a three-part identifier, the view will be created in the specified database and schema. If it is ...
The CREATE OR REPLACE VIEW command updates a view.The following SQL adds the "City" column to the "Brazil Customers" view:Example CREATE OR REPLACE VIEW [Brazil Customers] AS SELECT CustomerName, ContactName, City FROM Customers WHERE Country = "Brazil"; Try it Yourself » ...
CREATE VIEW view_name AS SELECT column_name(s) FROM table_name WHERE condition 可以从某个查询内部、某个存储过程内部,或者从另一个视图内部来使用视图。通过向视图添加函数、join 等等,我们可以向用户精确地提交我们希望提交的数据。 样本数据库 Northwind 拥有一些被默认安装的视图。视图 "Current Product List...