Database

How to find locks in sql server 2000

Sglima — Thu, 16 Jun 2011 16:03:56 GMT

/* Processes that are blocking others */
select * from 
sysprocesses
where spid in
(
select 
	blocked
from 
	syslocks l
	inner join sysprocesses p on p.spid=l.spid
where 
	p.dbid=5 -- Database ID
	and p.blocked<>0
)

/* Processes being blocked*/
select 
	p.*
from 
	syslocks l
	inner join sysprocesses p on p.spid=l.spid
where 
	p.dbid=5
	and p.blocked<>0

Linq error: MSDTC on server 'servername' is unavailable

Sglima — Wed, 11 Aug 2010 11:39:50 GMT

Occasionally an application that I am working on throws the above error...

After trying to fix my code for a bit, and not finding the problem I googled a bit and discovered that this error is caused by a windows service that must be running.

So, if you ever encounter this error, you must turn on the 'Distributed Transaction Coordinator' in order to solve it.

Hope this helps.

Original source: http://geekswithblogs.net/narent/archive/2006/10/09/93544.aspx

How to: Update a table from a select

Sglima — Fri, 09 Jul 2010 13:00:36 GMT

update n

set

n.fieldToUpdate=o.fieldToUpdateFrom

from

originaltable o

inner join toTable n on n.id= o.id

How to: Change the ownership of an object (MS SQL Server)

Sglima — Wed, 28 Apr 2010 13:44:20 GMT

exec sp_changeobjectowner 'ObjectName', 'newOwner'

More info at: http://msdn.microsoft.com/en-us/library/Aa259618

How to: Reset table index on SQL Server

Sglima — Tue, 02 Mar 2010 16:34:25 GMT

DBCC CHECKIDENT (yourtable, reseed, 0)

Enjoy :)

TimeOuts

Sglima — Wed, 17 Feb 2010 15:15:46 GMT

I think it's common knowledge that timeouts can be set on connection strings to ensure that a certain connection doesnt say open for more than SSS seconds.

What is not so common knowledge is the fact that on a transaction every single command has its own timeout value and if exceded it can bring down the entire transaction.

So when using transactions take in mind that you can set the connection timeout to 20 minutes, but if a single command that takes a few extra seconds can timeout.

To prevent this just set a timeout value for the command:

yourCommand.CommandTimeout = yourTimeOutValueInSeconds;

Enjoy :)