完整備份和差異備份資料庫的SQL腳本

工作中需要創建SQL Job對資料庫進行定期備份，現把腳本記錄如下。

1. 完整備份：

-- FULL
declare @filename    varchar(1024),
        @file_dev    varchar(300)

declare @path        varchar(1024)
set     @path = N'F:\Backup\Plan2\';

declare @extension_name varchar(16)
set     @extension_name = N'bak';

set @filename = convert(varchar(1024), getdate(), 120)
set @filename = replace(@filename, ':', '')
set @filename = replace(@filename, '-', '')
set @filename = replace(@filename, ' ', '')

set @filename = @filename + '_' + convert (varchar(3), datepart(ms, getdate())) + N'.' + @extension_name

-- start backup, COMPRESSION is the parameter
set @file_dev = @path + 'SmartDev_Full_' + @filename
backup database [SmartDev] to disk = @file_dev 
with noformat, init,  name = N'SmartDev-Database full backup', COMPRESSION

-- delete the old backup file 1 days ago
declare @olddate datetime
select @olddate=getdate()-1

-- execute delete
select @path
select @extension_name
select @olddate
execute master.dbo.xp_delete_file 0, @path, @extension_name, @olddate, 1
go

2. 差異備份：

-- Differential
declare @filename    varchar(1024),
        @file_dev    varchar(300)

declare @path        varchar(1024)
set     @path = N'F:\Backup\Plan2\';

declare @extension_name varchar(16)
set     @extension_name = N'bak';

set @filename = convert(varchar(1024), getdate(), 120)
set @filename = replace(@filename, ':', '')
set @filename = replace(@filename, '-', '')
set @filename = replace(@filename, ' ', '')

set @filename = @filename + '_' + convert (varchar(3), datepart(ms, getdate())) + N'.' + @extension_name

-- start backup, COMPRESSION is the parameter
set @file_dev = @path + 'SmartDev_Differential_' + @filename
backup database [SmartDev] to disk = @file_dev 
with differential, noformat, init,  name = N'SmartDev-Database Differential backup'

go

以上兩段可以分別創建兩個SQL Job，比如完整備份的作業可以定在每周天凌晨運行，執行成功後刪掉之前的備份文件（代碼中有刪除的語句），差異備份的作業定在周一到周六每天凌晨運行。