sql语句案例

创建表
/*create database db_testOne
 on(
    name='db_testOne_date',
    filename = 'D:\dataBaseTemp\db_testOne_date.mdf',
    size = 3mb,
    maxsize = 10mb,
    filegrowth = 5% 
 )
 /*日志文件的具体描述*/
 log on(
   name = 'db_testOne_data.ldf',
   filename = 'D:\dataBaseTemp\db_testOne_date.ldf',
   size = 2mb,
   filegrowth = 1mb
 )
 *//*使用数据库*/
 use db_testOne
 go 
 if exists(select * from sysobjects where name='StudentList')
 drop table StudentList
 create table StudentList(
   sid char(8) PRIMARY KEY,
   sname char(8) NOT NULL,
   sClassSelect char(8),
   sLibraryBooks int NOT NULL
 )
 go 
 if exists(select * from sysobjects where name='teacherList')
 drop table teacherList
 create table teacherList(
   sid char(8) PRIMARY KEY,
   sname char(8) NOT NULL,
   sClassTeach char(8),
   sLibraryBooks int NOT NULL
 )增删查改
 /*插入数据*/
 use db_testOne
 go
 /*INSERT INTO dbo.StudentList
 VALUES(10001,'张三','数学',1);
 INSERT INTO dbo.StudentList
 VALUES(10002,'李四','英语',2);
 INSERT INTO dbo.StudentList
 VALUES(10003,'王五','科学',3);
 */
 /*INSERT INTO dbo.StudentList
 VALUES(10004,'涨价话','数学',1);
 INSERT INTO dbo.StudentList
 VALUES(10005,'网卡成','英语',2);
 INSERT INTO dbo.StudentList
 VALUES(10006,'展期寻','科学',3);
 */
 /*查询*/
 /*select * from dbo.StudentList;*/
 /*WHERE dbo.StudentList.sLibraryBooks = 2;*/
 /*删除*/
 DELETE FROM dbo.StudentList
 WHERE dbo.StudentList.sname = '网卡成' AND dbo.StudentList.sLibraryBooks=2;
 select * from dbo.StudentList;
 /*更新*/
 UPDATE dbo.StudentList 
 SET sid = 999999,sLibraryBooks = 1
 WHERE dbo.StudentList.sname='张三';