I have a table which has 5000 rows of data in it. When i try to use a simple query “Select * From Table” its taking 20 seconds of time. I did not use any where conditions in my query. Its a just “Select * From Table”. I have different data type columns in my table including bit datatypes. I dont know how to improve the performance of my query. Please, help me in this.

I would disagree….see my post: http://www.techtree.co.uk/2011/10/table-scan-vs-index-scan/

select datename(weekday,c.date),count(*) from calender_table as c left join your_table as t
on c.datecol=t.datecol where t.datecol is null

[email removed]

select top 1 * from table_name

i am trying to get the i’th row record from the table in sql server 2000,
for example i give the query
select * from table_name where row_position=1

if it is possible to get 1′th record from the table?

In the execution plan it shows one index seek takes Cost 80%

There are appropriate indexes on the tables.
Can you suggest any more optimization.

I would suggest you create the index and check execution plan to see if it’s used. Then wait couple of days so that database can collect enough statistics and check it again. Finally sys.dm_db_index_physical_stats function tells a lot what’s going on with your indexes.

For example I created four composite index in a single table on one of your databases. All of them were used initially but eventually two of them was rendered useless so I dropped them and DB is running like charm.

I think you can create a composite Index on the three columns instead of creating indexes on each and every column to reduce space and to optimize the query performance. Correct me any body if i am wrong.

Have you tried Sql Server Database Tuning Advisor? It gives you nice list of indexes it thinks would be good. You can even tell it to suggest indexed views.

It’s hard to say which columns you should index just by your where-statement. You could try to index all of those three columns, index per column. After that check Execution Plan to see if indexes are being used or not.

i have 10 ten queries on three tables with 10 where conditions on one table.in that 10 ten queries 3 queries uses
where condition below

where city= and state=? and country=?

how indexes i need to create on these table(one or more).

this table getting truncate abd loaded everyday.

Please advise.

Check this MSDN article also:

http://technet.microsoft.com/en-us/library/ms189562.aspx

These articles and their subarticles might help also:

http://technet.microsoft.com/en-us/library/ms191227.aspx
http://technet.microsoft.com/en-us/library/ms345417.aspx

I have a select statement. How do I know if it is using the index which i created on one of the columns (and this column is included in the select list)

Great work!
Tim