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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No indexes, table scans, missing or out of date statistics,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
 
  Question Asked @ Answers
 
create table with fields ID, reserved_by,res_date res_date is datefield like 2010-03-09 00:00:00.000 from 2005 to 2006 any date assume based on res_date need to slect table and display based on month (full jan details in database irrespective of date and year   3
what is the output for this query select * from employee where 1=1;   4
what is the maximum size of sql row in mssql?   1
Explain the basic concepts of SQL server architecture?   2
What is better - 2nd Normal form or 3rd normal form? Why? TCS 2
What is a Linked Server?   1
How to restart SQL Server in single user mode? How to start SQL Server in minimal configuration mode? HCL 3
How to know the NAME of the Database and SIZE of the Database at the client node in Sql Server 2005   1
How to fetch records from a One to Many relationship table. eg: wanna get details of all orders for a specific customer. (do not want repeatation of master table records for child table records)   2
How cand Optimize SQL Server Stored Procedures   1
hi,i want t0 knom d syntax for a super key with an example   1
what are the joins,primary key,foriegn key, candidate key, super key and expain them? Polaris 6
 
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