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Question
What are the steps you will take to improve performance of 
a poor performing query?
 Question Submitted By :: SQL-Server
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
No indexes, table scans, missing or out of date statistics,
blocking, excess recompilations of stored procedures,
procedures and triggers without SET NOCOUNT ON, poorly
written query with unnecessarily complicated joins, too
much normalization, excess usage of cursors and temporary
tables.


Some of the tools/ways that help you troubleshooting
performance problems are: SET SHOWPLAN_ALL ON, SET
SHOWPLAN_TEXT ON, SET STATISTICS IO ON, SQL Server
Profiler, Windows NT /2000 Performance monitor, Graphical
execution plan in Query Analyzer.

 
Is This Answer Correct ?    13 Yes 1 No
Swapna
 

 
 
 
Other SQL Server Interview Questions
 
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what is diffence between replicaion and logshipping?   1
What is Full Outer Join?   3
How to avoid cursors? HP 3
Can we execute a stored procedure inside a trigger? United-Healthcare 6
The Difference between 'Count' and 'Count(*)'   13
how to get the rowid/rownumbes of a table in sqlserver IBM 6
How to delete an attribute from the emp table   4
how to delete duplicate rows in sql server2005 IBM 7
We create an index to fast the search. How it fast the query? Do we write any special keyword with query?   3
create index a on employee(dno) In this,which index was created?   2
select name of emplyoee whose total salary is 130 from following table. id name salary 1 a 100 2 b 20 3 c 50 1 a 30 2 b 70 Post the resulantant Query?   7
What are the difference between data length and length in SQL Server-2008? Scio-Healthcare 1
 
For more SQL Server Interview Questions Click Here 
 
 
 
 
 


   
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