Find the index fragmentation in a database

Whenever a query has a poor performance, the first step I take is to see if the indexes of the table in the query are fragmented badly.

use DB1
GO

SELECT ps.database_id, ps.OBJECT_ID, ps.index_id, si.name, ps.avg_fragmentation_in_percent,
(SELECT distinct so.name FROM sys.objects so INNER JOIN sys.indexes ON so.object_id = si.object_id) ParentTable
FROM sys.dm_db_index_physical_stats (7, NULL, NULL, NULL, NULL) AS ps
INNER JOIN sys.indexes si ON ps.OBJECT_ID = si.OBJECT_ID
AND ps.index_id = si.index_id
WHERE ps.database_id = DB_ID() AND si.name is not null AND
ps.avg_fragmentation_in_percent > 30
ORDER BY ps.avg_fragmentation_in_percent desc
GO


***Here "7" is the database Id of the curent database against which the query is run, in my e.g. DB1

you can find the database id of the current database by the following script
Use DB1
GO
SELECT DB_ID()
GO
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In the above results, I will be rebuilding the indexes of these tables.

Create non-clustered index online

USE [db1]
GO
CREATE NONCLUSTERED INDEX []
ON [dbo].[Patient_Table] ([HOSPITAL],[SSN],[Code])

GO


(online option is available ony on Entereprise edition)

Top 10 SQL Server 2008 Features for the Database Administrator (DBA)

We migrated to the new version Sql server 2008 R2 early this year but I am afraid that we have not been able to utilize all of the "awesome" features that sql 2008 comes with, though we have used SSIS, DBmail etc but that is in development aspect. Here is a list (yes of course the top 10). More blog posts to follow on the research and hands on experience on each of the follwing features.

1.Activity Monitor
2.[Sql Server Audit]
3.BackUp Compression - ( I love this feature - considering how many databases we backup daily and monthly)
4.Central Managemant Servers
5.Data Collector and Management Data Warehouse
6.Data Compression
7.Policy-Based Management ( as the team grows this will be helpful - to implement standards on that naming conventions.)
8.Predictable Performance and Concurrency
9.Resource Governor
10.Transparent Data Encryption (TDE)

ADD DROP Primary key on a SQL table

alter table DataUpdate_DTS
Add CONSTRAINT PK_ptno PRIMARY KEY (ptno)
GO


alter table DataUpdate_DTS
drop CONSTRAINT PK_DataUpdate_DTS
GO