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

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Databases Interview Questions

Questions Answers Views Company eMail

Whats the benefit of dbms_stats over analyze?

1 2081

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

1 2217

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?

1 2003

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 3314

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

Wipro,

1 5918

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,

1 2672

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

4 8025

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 7985

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 4155

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 5098

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 5471

Print 3 highest salary

9 12852

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

1 4707

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

2 5728

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 9190

Un-Answered Questions { Databases }

Have you written applications to retrieve stored images in a table?

1081

What is oracle latest version?

1165

what is spatial nonclustered index

1050

What is a view in sql?

1035

Where can you add custom error messages to sql server?

1197

Can we make the the chages By Using the Sql if u know any function or process please inform me Actuall result: BRK1 Break 1 Part 1 00:01:00:00 60 BRK1 Break 1 Part 2 00:01:00:00 60 BRK2 Break 2 Part 1 00:01:00:00 60 BRK2 Break 2 Part 2 00:01:00:00 60 BRK2 Break 2 Part 3 00:01:00:00 60 BRK3 Break 3 Part 1 00:01:00:00 60 BRK3 Break 3 Part 2 00:01:00:00 60 Desired O/P: BRK1 Break 1 Part 1 00:01:00:00 60 Part 2 00:01:00:00 60 BRK2 Break 2 Part 1 00:01:00:00 60 Part 2 00:01:00:00 60 Part 3 00:01:00:00 60

2291

Have you created fact table and dimension tables?

696

Hi , any one can help me on the same,this is regarding the Informatica Function doc,i want to know how developer is will develop the mapping. pl forwar the any function doc .just for my references. svlc75@yahoo.co.in

2091

Hi am new to PLSQL & facing problems in writing code like in SP, Functions, so any one having some SP coding with in depth explanation please share with me my Email ID suvarnaatsuvarna@rediffmail.com Or taking tanning on this please do contact me

2088

What are the different SQL Server Versions you have worked on?

1075

This question asked during interview, 2) At the end of each month, a new table is created for each bank that contains monthly metrics consolidated at the account level. The table naming convention is bankX_YYYYMM where X represents the numeric designation of the bank and YYYYMM indicates the 4 digit year and 2 digit month. The tables contain the following fields: name data type description account text account number registered boolean indicates whether the account is registered num_trans integer number of transactions made during the time period spend numeric(9,2) total spend during the time period a) Write a SQL query that will display the total number of transactions and total spend for "Bank1" during the 4th quarter of 2009. b) Write a SQL query that will display the total number of transactions and total spend at "Bank1" and "Bank2", broken out by registered vs. non-registered accounts, during January 2010 not sure what is correct answer and how to solve?

2553

Does any body has ORACLE Certification Dumps or Materials on 9i DBA, 10G DBA, Internet Application Developer, OCP 8i to 10g DBA Upgrade, Oracle 11i if any body have it, please kindly drop an email to: taruni_2k8@yahoo.com

2174

What are the kinds of subquery?

1091

What is your daily office routine?

2333

Explain “row_number()” in sql server with an example?

1066

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