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

Oracle (3259)
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MS Access (429)
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Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
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Database Management (1411)
Databases AllOther (288)

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?

2147

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?

1929

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 3221

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

Wipro,

1 5828

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,

2623

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

4 7853

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 7874

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 4034

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 4999

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 5375

Print 3 highest salary

9 12508

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

1 4618

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

2 5592

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 8965

Un-Answered Questions { Databases }

What is difference between procedure and trigger?

984

What is work_mem in postgresql?

868

Why do we use the mysql database server?

1054

What is the purpose of design view?

1009

How do you delete a trigger?

986

What are the steps to process a single select statement?

944

What is the use of mysqli_query?

887

How to include character strings in sql statements?

989

Mention what is olr?

What are the disadvantages of views in a database?

1059

What port is mysql running on?

939

Explain types of indexing in dbms?

1077

Discuss row chaining, how does it happen? How can you reduce it? How do you correct it?

550

What are the levels of architecture?

809

what is transaction state, buffer management, shadow paging

3461

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