一 创建create
1建库
例:create database 学生管理系统
on (name=std_Data
filename=‘E:\myDatabase\ std_Data.mdf’)
log on (name=std_log
filename=‘E:\myDatabase\ std_lod.ldf’)
2建表
例:create table book
(NookNo smallint [NOT NULL],
BookName char (15) [NOT NULL],
Author char(20) [NOT NULL],
primary key(BookNo),
foreig
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