SQLCMD Mode - Run your queries against several servers in a single query window.

To run your queries on different servers using the same query editor, you have to 

1.  First connect to a server
2. Open a new query
3. And now click on “Query” menu.
4. Choose “SQL CMD Mode”

Once you click on “SQL CMD Mode”, the query editor will go into command line mode.

Now type :Connect ServerName. This command will establish a connection to the server you have specified and then it will execute your query on that server.

Results:

Now if you go to “Messages” Tab, you will see the below result text (self explanatory).

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'Sev. 14 Errors' - Login failed for user 'NT AUTHORITY\SYSTEM'- Troubleshooting

Sometimes your SQL Error log might fill up with the error “Sev. 14 Errors – Login failed for user ‘NT AUTHORITY\SYSTEM’. [CLIENT : Local System ]”
This happens when user ‘NT AUTHORITY\SYSTEM’ local group does not have access to SQL Server and some service is trying to access SQL Server using this account.

To Trace out which services is causing this issue, first you will have to run the profiler. We do not require all the events, so we can apply the filter for profiler to capture only “Audit Login Failed” event class.

The results of profiler are below

With this data we can conclude that it is coming from SQLsafe application.

But from which process this is coming?

For this now we have to check the ClientProcessID column in the profiler results i.e. 5316 from the profiler results.

Now, when we check in the task manager of the server, PID 5316 is allocated for “SQLSafeBackupService.exe”

If PID is not visible in the processes Tab of TaskManager then go to “view” option and click on “Select Columns”. And choose PID (Process Identifier)

Now if we go to “services.msc” and check for the logon account of this service we see that this is running under “Local System” account.

Once the Logon account is changed to some service account which has access to SQL Server, then the error stops.

This article is also available in pdf format for downloading.

Please Click here to get your copy.

Row Not Found at the Subscriber - Replication Issue

When you find an issue in replication with the error “The row was not found at the Subscriber when applying the replicated command.”, first we have to get the Transaction sequence number and Command ID from the error.

This can be found at Distributer to Subscriber history in replication monitor.

Once we get the Transaction Sequence Number and Command ID we can easily drill down to the command which is causing the issue by using sp_browsereplcmds. Before to this, we have to also find out publisher_database_id.

For finding publisher_database_id, we need to make use of Transaction Sequence Number and Command ID.

Query to find publisher_database_id using Transaction Sequence Number and Command ID

select * from msrepl_commands where xact_seqno = 0x000BF8FB0003411E000400000000 and command_id=6

Once we get the publisher_database_id from the above query, then we need to execute the below query to get the command which is causing the error.

Query to find the command which is causing error

exec sp_browsereplcmds @xact_seqno_start = '0x000BF8FB0003411E000400000000', @xact_seqno_end = '0x000BF8FB0003411E000400000000', @Command_id=6, @publisher_database_id=60

Once we get the command, we can manually sync the missing data from publisher to subscriber to make the replication work fine as before.

Note: All these commands have to be run on distribution database.

This article is also available in pdf format for downloading.

Please Click here to get your copy.

T-SQL - Find which Object resides in which FileGroup

To Find which object resides in which FileGroup in a database, run the below queries.

/**************** For SQL 2000 ****************/

Select Distinct OBJECT_NAME(SI.id) AS ObjectName

        ,SO.type AS ObjectType

        ,FG.GroupName AS FileGroupName

from sysindexes SI , sysfilegroups FG ,sysobjects SO

where SI.groupid = FG.groupid and

      SI.id = SO.id

Order by ObjectName

/**************** For SQL 2005 and SQL 2008 ****************/

Select Distinct OBJECT_NAME(SI.object_id) AS ObjectName

        ,OBJECTPROPERTYEX(SI.object_id,'BaseType') AS ObjectType

        ,FG.Name AS FileGroupName

from sys.indexes SI , sys.filegroups FG

where SI.data_space_id = FG.data_space_id

Order by ObjectName