使用文件名变量日期脚本还原数据库

Question

I want to write a script that will restore the database by database name + today's date. Example: (test_01.05.2018.bak)

DECLARE @BackupFile as nvarchar(128);
SET @BackupFile = N'C:\backup\test1' + convert(varchar(12),Day(GETDATE()) -1) + (month(GETDATE()) * 100) + (year(GETDATE()) * 10000) + N'test1.bak'
USE master;
RESTORE DATABASE [TEST] FROM DISK = @BackupFile WITH FILE = 1,
MOVE N'test1' TO N'C:\db\TEST.mdf',  
MOVE N'test1_log' TO N'C:\db\TEST_log.ldf',
NOUNLOAD, REPLACE, STATS = 10

Answer 1

Your query would have had date in YYYYMMDD and yesterdays date. It errors because of converion.

It could be rewritten with something like

DECLARE @BackupFile as nvarchar(128);
SET @BackupFile = N'C:\backup\test1' + CONVERT(NVARCHAR(8), DATEADD(DAY, -1, GETDATE()), 112) + N'test1.bak'

You'll still have to edit the other parts of the string as I couldn't make sense of it but this will get your there.