Databases Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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DB Architecture (141)
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DB Development (113)
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Database Management (1411)
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Databases Interview Questions

Questions Answers Views Company eMail

Whats the benefit of dbms_stats over analyze?

2005

Typically, where is the conventional directory structure chosen for Oracle binaries to reside?

2148

You have found corruption in a tablespace that contains static tables that are part of a database that is in NOARCHIVE log mode. How would you restore the tablespace without losing new data in the other tablespaces?

1930

How do you recover a datafile that has not been physically been backed up since its creation and has been deleted. Provide syntax example.

1 3223

What are the differences between a sys and system user and what are the extra privileges available to the sys user?

Wipro,

1 5832

what are parameter, we can check after creating a database in terms of QC and for each tables what should be the parameters for QC and QA?

NIIT, TCS,

2625

What is difference b/w composit key n primary key and forigion key?

4 7857

Syntax to find the used space and free space of the Data file in a database(SQL Server). Following queries didn't give the exact Used space and Free Space Information sp_spaceused;DBCC showfilestats;exec MyDbName.dbo.sp_spaceused;SP_HELPFILE Can any one tell me the query for how to find the exact used data file space and free space in a Data File?

Cognizant,

2 7879

How to generate the Reports for the Database? I need an Example for it.Will we manually do this or else any script is there? Please let me know ASAP...

Cognizant,

1 4042

When we are using this query to shrink the log file,what exactly it will execute internally? Do we lose any data when we run this script? which data it will truncate in the log file and where it is saved. Please let me know... USE DatabaseName GO DBCC SHRINKFILE(, 1) BACKUP LOG WITH TRUNCATE_ONLY DBCC SHRINKFILE(, 1) GO

Cognizant,

1 5003

one of my database size is 2gb and Unrestricted Growth for Data file up to 10%.But every day after day I am getting Primary Data file is full 99.999 please take appropriate actions.Why it is? Even disk space is also not full,but still I am getting the alerts.

Cognizant,

1 5377

Print 3 highest salary

9 12515

What are the steps you will take to improve performance of a poor performing query?

1 4620

How to restart SQL Server in single user mode? How to start SQL Server in minimal configuration mode?

2 5597

Hi all, I need query help for below senorio, could you please help me. TableName = City CITYID ContinuationID CITYNAME 1 1 SAN 1 2 DIEGO 2 1 SAN 2 2 FRANCISCO 3 1 CHICAGO 4 1 NEW 4 2 YORK 4 3 CITY Could you please help me to write a generalized SQL that returns results as given below in the Query result CITYID NAME1 NAME2 NAME3 NAME4 NAME5 1 SAN DIEGO 2 SAN FRANCISCO 3 CHICAGO 4 NEW YORK CITY

TCS,

5 8971

Un-Answered Questions { Databases }

What are logical/boolean operations in ms sql server?

1051

How to write a query to show the details of a student from students table whose

1002

Can you joined two sources without common column?

620

To which devices can a backup be created and where should these devices be located? : sql server management studio

1049

How to install mongodb on our machine?

List out the components of logical database structure of oracle database.

1039

What are the different type of replication in sql server?

985

What is an inconsistent dependency?

1051

What is the difference between indexes,views,synonyms?

1134

Are there any alternatives to isql in sybase?

936

Tell me something about security and sql azure?

114

Define b-trees.

916

Can you achieve primary key - foreign key relationships in mongodb?

What is b tree index?

920

What is the fastest way to permanently delete a 1 million row table named customers?

1255

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