备份

BACKUP DATABASE [msdb] 
TO  DISK = N'D:\liyuanshuai\test\sqlserver_bakfile\msdb20241219.bak' 
WITH NOFORMAT, NOINIT,  NAME = N'lys-完整 数据库 备份', 
SKIP, NOREWIND, NOUNLOAD, 
COMPRESSION, 
STATS = 10
GO

然后删除2个测试的job，停止 SQL Server 代理（否则还原msdb库的时候会报错）

还原

USE [master]
RESTORE DATABASE [msdb]
FROM  DISK = N'D:\liyuanshuai\test\sqlserver_bakfile\msdb20241219.bak'
WITH  FILE = 1, 
NOUNLOAD,  STATS = 5GO

然后启动SQL Server 代理服务，刷新job后，删除的2个测试job就恢复了