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Databases Interview Questions
Questions Answers Views Company eMail

Whats the benefit of dbms_stats over analyze?

2000

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

2142

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?

1928

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 3216

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

Wipro,

1 5823

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,

2622

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

4 7842

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 7868

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 4026

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 4990

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 5372

Print 3 highest salary

9 12491

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

1 4616

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

2 5584

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 8954


Un-Answered Questions { Databases }

Is mysql better than oracle?

934


Explain what stored procedure sp_replcounters is used for? : sql server replication

1518


How to improve query performance using index hunting?

1174


how to delete duplicate rows from a join tables(I have three tables on that join) how do you know which join is need to be used? The select statement I have is: SELECT gc_skill_type.skill_type, gc_area_tec.area, gc_technology.technology, gc_technology.id_technology, gc_area_tec.id_area_tec FROM gc_skill_type, gc_area_tec, gc_technology WHERE gc_area_tec.id_skill_type (+) = gc_skill_type.id_skill_type AND gc_technology.id_area_tec (+) = gc_area_tec.id_area_tec order by gc_skill_type.skill_type asc, gc_area_tec.area asc, gc_technology.technology asc

4014


what is data manipulation language? : Sql dba

1014


What does Master database contains?

1136


How to do login in mysql with unix shell.

1109


What does mvcc mean?

842


Comment,Datatypes are unlimited

2057


what does it mean to have quoted_identifier on? : Sql dba

1144


What is enhanced database mirroring in sql server 2008?

971


How to get a list of columns using the "sys.columns" view in ms sql server?

954


What is the Control Flow in SSIS

1092


You have to store user responses of ‘yes’ and ‘no’ what kind of data type is best suited for this task?

946


Who is the founder of database?

1112