创建视图 sql>create view 视图名 as select语句; 修改视图并添加别名 sql>create or replace view empvu10 (employee_number,employe_name,job_title) as select empno,ename,job from emp where deptno=10; 删除视图 drop view 视图名 创建存储过程 create procedure 过程名(in n varchar(20),out m int
create database Liber; use Liber; #顯示數据庫 20150210 Geovin Du 涂聚文 SHOW DATABASES; drop table BookKindList; #书目录 create table BookKindList ( BookKindID INT NOT NULL AUTO_INCREMENT, #自动增加 BookKindName nvarchar(500) not null, BookKindParent int null, PRIM
use geovindu; #函数 DELIMITER $$ drop function if exists f_GetDepartmentName $$ CREATE function f_GetDepartmentName ( did int ) returns nvarchar(400) begin declare str nvarchar(100); select DepartmentName into str from DepartmentList where DepartmentID
DROP DATABASE `wordpress`;------------------------------------------------------------------ CREATE DATABASE `wordpress` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; ----------------------------------------------------------------------------
视图是一种虚表,使用CREATE VIEW语句来定义视图,该视图是基于一个或多个表或视图的逻辑表.一个视图本身不包含任何数据, 视图所基于的表称为基表. 视图就相当于一条select 语句,定义了一个视图就是定义了一个sql语句, 视图不占空间,使用视图不会提高性能,但是能简化sql语句 . 创建视图: create view 视图名; 如: create or replace view v_test as select * from test where age=10; create or
create view View_count as SELECT spkfk.spid, pf_ckmx.rq, pf_ckmx.spid AS Expr1, pf_ckmx.shl, spkfk.spbh, spkfk.spmch, pf_ckmx.djbh FROM ksoa.dbo.spkfk INNER JOIN ksoa.dbo.pf_ckmx ON ksoa.dbo.spkfk.spid = ksoa.dbo.pf_ckmx.spid where ksoa.d