Sql Server Backup Script

ginganinja — Fri, 11 Sep 2009 11:05:51 +0000

Well, hello, this is my first ‘real’ post. Hopefully there’ll be more..

A problem I came up against a while ago was with trying to copy a database from an old development sql server to a new one, but being able to change the table structure of the original one, and still be able to copy it all across.

I created a script that could adjust to changes on the database structure, and use bcp (bulk copy) so that it would be nice and speedy. The bcp script will remember the id’s that are on the source database so that it all works correctly.

I decided to use Powershell because I have been looking into it a bit, and it’s already on Vista.

So here is the main Powershell script:

$destServer = "DESTINATION SERVER"
$sourceServer = "SOURCE SERVER"
$destDBase = "DESTINATION DATABASE"
$sourceDBase = "SOURCE DATABASE"
$ScriptsPath = "SCRIPTS LOCATION"
$ExportLocation = "EXPORTED FILES LOCATION"
$NumberofTables = 31 # The number of tables in you database

cd 'c:\Program Files\Microsoft Sql Server\90\Tools\Binn'
# All this recreates the database

SqlCmd -S $destServer -E -i "$ScriptsPath\DetachDBase.sql" -v dbasename = $destDBase
SqlCmd -S $destServer -E -i "$ScriptsPath\reattachDBase.sql" -v dbasename = $destDBase
SqlCmd -S $destServer -E -i "$ScriptsPath\DropDBase.sql"
SqlCmd -S $destServer -E -i "$ScriptsPath\CreateDBase.sql"
# This is generated by Sql Server Management Studio using the 'Generate Scripts' facility
SqlCmd -S $destServer -E -d $destDBase -i "$ScriptsPath\CreateTablesAndSPs.sql"
Sqlcmd -S $sourceServer -E -d $sourceDBase -i "$ScriptsPath\CreateImportExportScript.sql" -v dbasename = $sourceDBase ExportLocation = $ExportLocation serverName = $sourceServer -o "$ScriptsPath\ExportScript.bat" -w 250 -h -1 -k 1 # specifying width stops the commands going onto separate lines
# Couldn't work out how to filter any number of rows affected (that is - the number of tables in the database)
# I replace ..User with ..[User] because I stupidly had a user table in my database
# The last replace removes extra spaces
(Get-Content "$ScriptsPath\ExportScript.bat") | where {$_ -ne "($NumberOfTables rows affected)"} | Foreach-Object {$_ -replace "..User ", "..[User] "} | Foreach-Object {$_ -replace "  ", ""} | Set-Content "$ScriptsPath\ExportScript.bat"
Sqlcmd -S $sourceServer -E -d $sourceDBase -i "$ScriptsPath\CreateImportExportScript.sql" -v dbasename = $destDBase ExportLocation = $ExportLocation serverName = $destServer -o "$ScriptsPath\ImportScript.bat" -w 250 -h -1 -k 1
(Get-Content "$ScriptsPath\ImportScript.bat") | where {$_ -ne "($NumberOfTables rows affected)"} | Foreach-Object {$_ -replace "..User ", "..[User] "} | Foreach-Object {$_ -replace "  ", ""} | Set-Content "$ScriptsPath\ImportScript.bat"
cd "$ScriptsPath"
.\ExportScript.bat
.\ImportScript.bat

The script references a number of other scripts. The first 5 are created using Sql Server Management Studio. Note these scripts are for the destination databse. So we have a detach, reattach, drop, and create script. The dettach and reattach ensure that there are no other connections to the database.

The 5th script is created by right-clicking on the source database in Sql Server Management Studio, and selecting ‘Tasks’ –> ‘Generate Scripts’.

Unfortunately I do not know how to generate these scripts automatically from the command line – anyone got any ideas to make the script (almost) perfect?

There are is one other script that does the ‘dirty’ work. CreateImportExportScript.sql:

   1: select '"c:\Program Files\Microsoft Sql Server\90\Tools\binn\bcp.exe" $(dbasename)..'+name+' out "$(ExportLocation)'+name+'.tab" -n -S $(serverName) -E -T' from sysObjects

   2: where xtype = 'U'

So to summarise what the powershell script does:

Dettach, reattach, drop, and recreate the database, and then generate the tables and stored procedures. Then generate import and export scripts. Before using them, the script cleans up the scripts so that they will work (removing the number of lines returned and excess spaces).

I think that this is probably the quickest way of getting a database copy up and running from an existing database.

Enjoy!

Hello world!

ginganinja — Thu, 05 Mar 2009 12:52:58 +0000

Good day to you who happens to be looking! First post, just to give an idea of what I intend to post on here. My current big things are iPhone, Silverlight, and .net development, but maybe I’ll put some other stuff on here so non-geeks don’t get bored. We shall see…

Shepherding Code

Sql Server Backup Script

Hello world!