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SQL Server Interview Questions Page 1
KAASHIV INFOTECH
The Asia, India,TamilNadu Book
Of Record Holders
SQL SERVER –Booklet
12 - Gives you the interview tip SQL Server
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SQL Server Interview Questions Page 2
KaaShiv InfoTech
Welcomes you to the Expert Voice Corner
Mr.J.Venkatesan Prabu
Venkatesan Prabu Jayakantham (venkat) has more than 8 years
experience in the Microsoft Technologies such as VB.Net, ASP.Net, C#.net,
SSIS, SSAS, ADO.Net, etc., He is the Managing Director of KAASHIVINFOTECH
(http://www.kaashivinfotech.com/),a software company in Chennai. Before
that, he worked in HCL Technologies (India and Australia) for six years as
Project Lead. As a service motive, Venkat contributed more than 700 articles
which is read by the developers in 170 countries (400 developers per day)
(http://venkattechnicalblog.blogspot.com/). Aligned with KaaShiv InfoTech’s
mission,he met more than 20,000 young minds and spreaded Microsoft
Technologies / Career guidance programs. Venkat won many awards in his
career, which includes Prestigious Microsoft MVP (Most Valuable Professional)
award for the years 2008,2009,2010,2011,2012,2013 and won many awards.
List of other awards in his career,
Microsoft certified Smart .Net Candidate in 2004
Most valuable member for dotnetspider site in 2007
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SQL Server Interview Questions Page 3
HCL SQL Subject Matter expert (SME - SQL Server) for the year
(2008,2009)
HCL Special contribution award winner on Dotnet skills for year(2008)
HCL SQL Knowledge Champion for the year 2009
MindCracker MVP on SQLServer –2010 for the year 2010,2011
INETA champion - Gold Member – 2010 for the year 2010 HCL Service
Contribution Award for the year 2010
Leading Lights "Rising Star" award from Common Wealth Bank,
Australia for the year 2010
TECHNICAL CERTIFICATION
Cisco certified Network Associate (CCNA) – 2004
Microsoft Certified Application Developer (MCAD) – 2005
ACKNOWLEDGEMENT
I would like to thank my family members for their support and
encouragement. Without their support it would be impossible for me to
publish this e-book. I would also like to thank my KaaShiv InfoTech team for
their support to publish this e-book.
DISCLAIMER
All rights reserved. No part of this book may be copied, adapted,
abridged or stored in any retrieval system, computer system, photographic or
other system or transmitted in any form or by any means
without the prior written permission of the copyright holders.
Any breach will entail legal action and permission without
further notice.
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SQL Server Interview Questions Page 4
1.What is Cross Join?
A cross join that does not have a WHERE clause produces the Cartesian product of
the tables involved in the join. The size of a Cartesian product result set is the number of
rows in the first table multiplied by the number of rows in the second table. The common
example is when company wants to combine each product with a pricing table to analyze
each product at each price.
.
2.How do SQL server 2000 and XML linked? Can XML be used to access data?
FOR XML (ROW, AUTO, EXPLICIT)
You can execute SQL queries against existing relational databases to return results as
XML rather than standard rowsets. These queries can be executed directly or from within
stored procedures. To retrieve XML results, use the FOR XML clause of the SELECT
statement and specify an XML mode of RAW, AUTO, or EXPLICIT.
OPENXML
OPENXML is a Transact-SQL keyword that provides a relational/rowset view over
an in-memory XML document. OPENXML is a rowset provider similar to a table or a view.
OPENXML provides a way to access XML data within the Transact-SQL context by
transferring data from an XML document into the relational tables. Thus, OPENXML allows
you to manage an XML document and its interaction with the relational environment.
3.What command do we use to rename a db?
sp_renamedb ‘oldname’ , ‘newname’
If someone is using db it will not accept sp_renmaedb. In that case first bring db to
single user using sp_dboptions. Use sp_renamedb to rename database. Use sp_dboptions to
bring database to multi user mode.
INTERNSHIP IN KAASHIV INFOTECH
-Best internship provider in Chennai
Web Application Designing
Project Documentation
Live Inhouse Application
Development
Windows ADO.NET Application
Template Designing-Live Template
Designing, CSS
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SQL Server Interview Questions Page 5
4.What are the different types of replication? Explain.
The SQL Server 2000-supported replication types are as follows:
Transactional
Snapshot
Merge
Snapshot replication distributes data exactly as it appears at a specific moment in time and
does not monitor for updates to the data. Snapshot replication is best used as a method for
replicating data those changes infrequently or where the most up-to-date values (low latency)
are not a requirement. When synchronization occurs, the entire snapshot is generated and sent
to Subscribers.
Transactional replication, an initial snapshot of data is applied at Subscribers, and then when
data modifications are made at the Publisher, the individual transactions are captured and
propagated to Subscribers.
Merge replication is the process of distributing data from Publisher to Subscribers, allowing
the Publisher and Subscribers to make updates while connected or disconnected, and then
merging the updates between sites when they are connected.
5.What are the OS services that the SQL Server installation adds?
MS SQL SERVER SERVICE, SQL AGENT SERVICE, DTC (Distribution transac co-
ordinator)
6.What are three SQL keywords used to change or set someone’s permissions?
GRANT, DENY, and REVOKE.
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SQL Server Interview Questions Page 6
7.What does it mean to have quoted identifier on? What are the implications of having
it off?
When SET QUOTED_IDENTIFIER is ON, identifiers can be delimited by double
quotation marks, and literals must be delimited by single quotation marks. When SET
QUOTED_IDENTIFIER is OFF, identifiers cannot be quoted and must follow all Transact-
SQL rules for identifiers.
8.What is the STUFF function and how does it differ from the REPLACE function?
STUFF function to overwrite existing characters. Using this syntax,
STUFF(string_expression, start, length, replacement_characters), string_expression is the
string that will have characters substituted, start is the starting position, length is the number
of characters in the string that are substituted, and replacement_characters are the new
characters interjected into the string.
REPLACE function to replace existing characters of all occurance. Using this syntax
REPLACE(string_expression, search_string, replacement_string), where every incidence of
search_string found in the string_expression will be replaced with replacement_string.
9.How many rows are returned by these two select statements?
2 and 2
Each select statement actually returns 2 rows. You can use this script to check this:
create table mytable
( id int identity(1,1)
, mychar varchar(20)
)
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SQL Server Interview Questions Page 7
go
insert mytable select null
insert mytable select ''
insert mytable select ' '
go
set ansi_nulls on
set ansi_null_dflt_on on
select * from mytable
where mychar is not null
select * from mytable
where mychar <> '' and mychar is not null
select * from mytable
where mychar <> ' ' and mychar is not null
select * from mytable where mychar = ''
select * from mytable where mychar = ' '
set ansi_null_dflt_on off
set ansi_nulls off
go
drop table mytable
10.If you run this, what does it return?
select applock_mode('public', 'SalesApp', 'Transaction')
The type of lock being held by an application that requested it.
This command returns the lock mode held by an application that was requested with the
sp_getapplock procedure.
insert mytable select ''
insert mytable select ' '
select * from mytable where mychar = ''
select * from mytable where mychar = ' '
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SQL Server Interview Questions Page 8
KaaShiv InfoTech Offers Best Inpant Training in Chennai.
The training at KAASHIV INFOTECH focus on developing the technical oriented concepts
that turn graduates into employable assets. Handled only by professionals from MNC companies, we
know how to equip you with strong technologies fundamentals.
INPLANT TRAINING SCHEDULE FOR CSE/IT/MCA STUDENTS
Day Programme
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SQL Server Interview Questions Page 9
Day Programme
Day 1 BigData (Practical Demos)
Day 2 Windows 8 App Development (Practical Demos)
Day 3 Ethical Hacking (Facebook Hack,Server/Website Hacking(20 Attacks)
Day 4 Cloud Computing (Live Server Demo,Live Pjt Implementation)
Day 5 CCNA (-Networking-Router Configurations Practical Demo)
INPLANT TRAINING SCHEDULE FOR ELECTRONIC/ELECTRICAL/EIE STUDENTS
Day Programme
Day 1 Embedded System (Embedded Program Designing ,Chip Burning)
Day 2 Wireless System (Device Designing,Controlling Fans with Wireless
Sensors)
Day 3 CCNA (-Networking-Router Configurations Practical Demo)
Day 4 Ethical Hacking (Facebook Hack,Server/Website Hacking(20
Attacks)
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SQL Server Interview Questions Page 10
Day Programme
Day 5 Matlab (Capture Image,Processing, Animate Images-Practical
Demos)
MECHANICAL/CIVIL INPLANT TRAINING SCHEDULE
Day Programme
Day 1 Aircraft Designing
Day 2 Vehicle Movement in Airports
Day 3 3D Packaging Designs
Day 4 3D Modeling
Day 5 3D Window Shading
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Address:
KAASHIV INFO TECH
Shivanantha Building,
X41, 5th Floor,2nd Avenue,
(Near Ayyappan Temple)
Anna Nagar, Chennai = 600040.
Send Us Your Request Email To arun@kaashivinfotech.com,
kaashiv.info@gmail.com,
venkat@kaashivinfotech.com
Contact Number : 9840678906 ;; 9003718877 ;; 9962345637 ;
Visit our other websites:
http://www.inplanttrainingchennai.com
http://www.inplanttraining-in-chennai.com
http://www.Kaashiveinotech.com
http://www.internshipinchennai.in
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SQL Server Interview Questions Page 12
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Feedback URLS
KaaShiv InfoTech Facebook Page
https://www.facebook.com/KaaShivInfoTech
Inplant Training Program in Chennai
https://www.facebook.com/pages/Inplant-Training-Program-in-
Chennai/1402097696706380
Internship in Chennai
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SQL Server Interview Questions Page 13
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