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SQL restore data base through Vbscript

Hello,

I have the following VB script to restore a data base

I would like to add a loop in order to restore the most recent file from a path. With this I wouldn't need to type every time the name of the file to restore.


'VBScript to Restore the database

Option Explicit

Dim adoCommand
Dim strConnectionstring
Dim strBackupFile
Dim strServreName
Dim strDatabaseName

' Specify backup path to be restored to the database.
strBackupFile = "D:\BackUpPath\BackUpFile.bak"

'Specify the name of server and instance if present to which backup file need to be restored .
strServreName ="ServerName"

'Specify the database name to restore the file.
strDatabaseName ="DataBaseName"

' Specify connection string to Master Database on SQL server, else u may see errors like
' Error: RESTORE cannot process database 'DataBaseName' because it is in use by this session. It is recommended that the master database be used when performing this operation.
' If using the default instance, use SERVER=MyServer.
strConnectionstring= "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=MASTER;Data Source=" & strServreName

' Restore database from backup.
Set adoCommand = CreateObject("ADODB.Command")
On Error Resume Next
adoCommand.ActiveConnection = strConnectionstring
If (Err.Number <> 0) Then
Wscript.Echo "Unable to connect to SQL database."
Wscript.Echo Err.Description
Wscript.Quit
End If
On Error GoTo 0
adoCommand.CommandText = " Create database " & strDatabaseName
adoCommand.CommandText = "RESTORE DATABASE "& strDatabaseName &" FROM DISK='" & strBackupFile & "' with Replace"
adoCommand.Execute
MsgBox "Restore Completed Successfully "
Set adoCommand = Nothing
0
LD16
Asked:
LD16
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1 Solution
 
Vitor MontalvãoMSSQL Senior EngineerCommented:
You don't need the CREATE DATABASE statement. Will give error if the database already exists.
The RESTORE command will create or overwrite the database in case of it already exists. And if it exists you need to be sure that no one is connected to the database or else the command will fail.

Also, you are only taking in considerations the full backups? What about the differential backups? And the transaction log backups?
What about if there is more than one backup file from the same database? How do you'll handle this?

And the most important thing. You are creating a dangerous script. Bad use of this script will destroy your databases quickly. Use it very, very wise.
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David ToddSenior DBACommented:
Hi,

As above: Be very very careful.

A mistake I've seen is attempting to restore a database with a corrupt backup, and while the current database had issues, its far better than the nothing a corrupt backup may give.

Regards
  David
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LD16Author Commented:
Hello,
Thank you all for your comment, in that case could you please prove an SQLCMD, PowerShell in which I need to put just the path of the DB that I want to restore.

The restore need to be with Overwrite existing DB.

Thank you again for your help.
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David ToddSenior DBACommented:
Hi,

Not so simple.

The reason is that when you restore from a foreign backup, SQL has no idea where to put the datafiles. If you restore a database from a recent backup then SQL may guess on the location and name of the physical datafiles.


ie
restore database mydatabase
from disk = 'ThePhysicalPath&Filename&Extension'
with
    replace
    , move 'datalogicalfile' to 'dataphysicalPath&File&Extension'
    , move 'loglogicalfile' to 'logphysicalPath&File&Extension'
    , stats - 5
;

So, all that to ask, how from the path is the script supposed to guess the databasename, the datalogicalfile, the loglogicalfile etc. Assuming that there is only one data file and one transaction log file.

Regards
  David
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Vitor MontalvãoMSSQL Senior EngineerCommented:
The restore need to be with Overwrite existing DB.
Data and transaction log files included? If so, you need to assure that directory structure in the target server it's the same as in the source server.
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LD16Author Commented:
Yes, it is the case.
0
 
Vitor MontalvãoMSSQL Senior EngineerCommented:
Then the command should be simple as:
RESTORE DATABASE DatabaseName
FROM DISK = 'drive:\\path\filename.bak'

Or by your code:
adoCommand.CommandText = "RESTORE DATABASE "& strDatabaseName &" FROM DISK='" & strBackupFile

Open in new window

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LD16Author Commented:
@Victor: Can I run this code with a .bat file?
How can I add a loop to restore the most recent file available at:
drive:\\path\?
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Vitor MontalvãoMSSQL Senior EngineerCommented:
What you mean a .bat file?
You can use SQLCMD that accepts a SQL Server script as input.
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LD16Author Commented:
Yes I mean a .bat file?
Could you please provide the full SQLCMD version?

Thank you in advance.
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Vitor MontalvãoMSSQL Senior EngineerCommented:
This is an example to run a script (-i) in a named instance (-S) with integrated authentication (-E)
SQLCMD -S ServerName\InstanceName -E -i Restore.sql

Open in new window

You can add that command into a .bat file if you want.
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