（二）：数据定义语言之数据库操作示例

--创建数据库

create database student2

on primary

(

name = 'student2_data',

filename = 'E:\SQlserverWorkspace\student2_data.mdf',

size = 5mb,

maxsize = 20mb,

filegrowth = 20%

)

log on 

(

name = 'student2_log',

filename = 'E:\SQlserverWorkspace\student2_log.ldf',

size = 5 mb,

maxsize = 10mb,

filegrowth = 2mb

)

go 

--创建一个多数据文件和日志文件的数据库

create database students 

on primary 

(

 name  = students1,

 filename = 'E:\SQlserverWorkspace\students1_data.mdf',

 size = 5 mb,

 maxsize = unlimited,

 filegrowth = 10%

),

(

 name  = students2,

 filename = 'E:\SQlserverWorkspace\students2_data.mdf',

 size = 10 mb,

 maxsize = 100 mb,

 filegrowth = 1

)

log on 

(

 name = students_log1,

 filename = 'E:\SQlserverWorkspace\students_log1.ldf',

 size = 5 mb,

 maxsize = 50 mb,

 filegrowth = 1

),

(

 name = students_log2,

 filename = 'E:\SQlserverWorkspace\students_log2.ldf',

 size = 5 mb,

 maxsize = 50 mb,

 filegrowth = 1

)

go

//

--修改数据库

--增加数据库的空间

alter database student2

modify file

(

 name = student2_data,

 size = 20mb

)

--增加数据文件

alter database student2

add file

(

 name = 'student2_data1',

 filename =  'E:\SQlserverWorkspace\student2_data1.mdf',

 size = 5 mb,

 maxsize = 10 mb,

 filegrowth = 5%

)

--更改数据库的名称

--更改数据库的名称是调用系统的存储过程（sp_renamedb）执行的。

sp_renamedb 'student2','studentnew'

--删除数据库

drop database students