创建视图是指在已经存在的MySQL数据库表上建立视图。视图可以建立在一张表中,也可以建立在多张表中。 基本语法 可以使用 CREATE VIEW 语句来创建视图。 语法格式如下: CREATE VIEW <视图名> AS <SELECT语句> 语法说明如下。 <视图名>:指定视图的名称。该名称在数据库中必须是唯一的,不能与其他表或视图同名。
二. 创建MySQL视图——create view 语法 create [or replace] [algorithm = {undefined | merge | temptable}] view [db_name.]view_name [(column_list)] as select_statement [with [cascaded | local] check option] 通过该语句可以创建视图,若给定了[or replace],则表示当已具有同名的视图时,将覆盖原...
Create or replace View:These keywords serve to create or replace the existing View. When we run the create or the replace view statement, MySQL checks whether it exists in the database. If the View exists, it changes the View definition using the query specified after the AS keyword. If t...
Como puedo crear vistas en mysql 4.1, lo he intentado y me da error 1064 (error de sintaxis por version del mysql. gracias. CiroNavigate: Previous Message• Next Message Options: Reply• Quote Subject Written By Posted create view in mysql 4.1 ciro robles March 21, 2005 04:38PM ...
For example, if a view is defined as SELECT * on a table, new columns added to the table later do not become part of the view, and columns dropped from the table result in an error when selecting from the view. The ALGORITHM clause affects how MySQL processes the view. The DEFINER ...
mysql>CREATEVIEWv(mycol)ASSELECT'abc';Query OK, 0 rows affected (0.01 sec)mysql>SETsql_mode='';Query OK, 0 rows affected (0.00 sec)mysql>SELECT"mycol"FROMv;+---+|mycol|+---+|mycol|+---+1 row in set (0.01 sec)mysql>SETsql_mode='ANSI_QUOTES';Query OK, 0 rows affected (0.00...
Bug #37191Failed assertion in CREATE VIEW Submitted:4 Jun 2008 11:15Modified:23 Mar 2009 1:59 Reporter:Martin HanssonEmail Updates: Status:ClosedImpact on me: None Category:MySQL Server: Security: PrivilegesSeverity:S2 (Serious) Version:5.1, 6.0OS:Any ...
FIND_IN_SET(id, ( SELECT user_ids FROM teacher WHERE id = acqi.id )) )as studentName, 1. 2. 3. 4. 5. 6. 7. 8. 9. 总结: mysql函数解决了什么问题 数据处理:MySQL函数可以对数据进行处理和转换,比如对字符串进行分割、连接、替换、格式化等操作,对日期进行格式化、计算等操作,对数值进行计算...
Collation=utf8_unicode_ci set via MySQL Administrator set character set utf8; create database mytest character set utf8 collate utf8_unicode_ci; create table a(col1 varchar(12),col2 varchar(12)); insert into a values('b','c'); insert into a values('d','e'); create view v1 as...
/***/ drop view if exists view_temp; set @sql=concat('create view view_temp as select userid,productid userorderitem',dbIndex,' orderby userid'); prepare stm from @sql; execute stm; deallocate prepare stm; show create view view_temp;---(1) set dbIndex =db...