数据库备份、还原、删除、收缩，创建登录用户，数据库用户等操作脚本

记录一下/

--备份数据库
use [master]
go
BACKUP DATABASE [LnkSys11] TO 
DISK = N'C:\BackUp\LnkSys11.bak' WITH   --备份文件存放路径
NOFORMAT,
INIT,    --INIT:覆盖备份;NOINIT: 追加备份
NAME = N'LnkSys11-Full Database Backup', 
SKIP, 
NOREWIND, 
NOUNLOAD, 
STATS = 10
GO

--删除数据库
drop database [LnkSys11]
go

--创建登陆帐户(create login)
if not exists (select 1 from master.dbo.syslogins where Loginname='test')
  create login test with password='1234567890', CHECK_POLICY = OFF, default_database=master
go

--还原数据库
USE [master];
GO
RESTORE DATABASE [LnkSys11] FROM
DISK = N'C:\BackUp\LnkSys11.bak'    --待还原文件位置
WITH FILE = 1,
--数据库文件,日志文件存放路径，
MOVE N'WCS_Data' TO N'c:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\data\LnkSys11.mdf',
MOVE N'WCS_Log' TO N'c:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\data\LnkSys11.ldf',
RECOVERY,
NOUNLOAD,
--replace,    --替换已有数据库
STATS = 10
GO

--收缩数据库，和日志文件
-----------begin-----------
use [LnkSys11]
go
alter database [LnkSys11] set recovery simple with NO_WAIT
go
alter database [LnkSys11] set recovery simple 
go
--收缩日志文件
declare @name varchar(50),
        @sql  varchar(100);
SELECT @name = [NAME] FROM sys.database_files where [type]=1
set @sql = 'dbcc shrinkfile(N'''+@name+''', 10, truncateonly)';
exec (@sql)
go
dbcc shrinkdatabase([LnkSys11])
go
--恢复数据库为完整模式
alter database [LnkSys11] set recovery full with NO_WAIT
go
alter database [LnkSys11]  set recovery full
go
-----------end-----------

--创建数据库(LnkSys11)用户
use [LnkSys11]
go
if exists (select 1 from sys.sysusers where issqluser=1 and name='test')
  exec sp_dropuser 'test'
create user test for login test with default_schema=dbo
go
exec sp_addrolemember 'db_owner', 'test'
go

--判断是否存在用户自定义用户，如果存在则删除。

use [LnkSys11]
go
if exists(select * from sys.database_principals where name='test')

begin 
  declare @UserRole varchar(20), 
          @SQL varchar(300);
  --获取用户拥有的角色信息。
  declare cur_UserRole cursor for select [name] from sys.schemas where principal_id=user_id('test')
  open cur_UserRole 
  fetch next from cur_UserRole into @UserRole 
  while @@fetch_status=0
  begin
    --把架构所有者修改回来架构自身
    set @SQL = 'alter authorization on schema::['+@UserRole+'] to ['+@UserRole+']; ';
    --删除角色拥有的成员 需要高版本(SQL2017测试通过),2008 R2 无效
    set @SQL = @SQL+'alter role ['+@UserRole+'] drop member [test]';
    exec(@SQL);
    fetch next from cur_UserRole into @UserRole
  end
  close cur_UserRole;
  deallocate cur_UserRole;
  --删除用户
  drop user [test];
end;
go