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

Oracle (3259)
SQL Server (4518)
MS Access (429)
MySQL (1402)

Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)

Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)

Database Management (1411)
Databases AllOther (288)

Databases Interview Questions

Questions Answers Views Company eMail

How does Oracle guarantee data integrity of data changes?

2387

Which environment variables are absolutely critical in order to run the OUI?

2118

What SQL query from v$session can you run to show how many sessions are logged in as a particular user account?

1 3592

Why does Oracle not permit the use of PCTUSED with indexes?

2424

What would you use to improve performance on an insert statement that places millions of rows into that table?

1 3715

What would you do with an in-doubt distributed transaction?

1978

What are the commands youd issue to show the explain plan for select

2 5280

In what script is snap$ created? In what script is the scott/tiger schema created?

2708

If youre unsure in which script a sys or system-owned object is created, but you know its in a script from a specific directory, what UNIX command from that directory structure can you run to find your answer?

2149

How would you configure your networking files to connect to a database by the name of DSS which resides in domain icallinc.com?

1915

You create a private database link and upon connection, fails with: ORA-2085: connects to . What is the problem? How would you go about resolving this error?

1 8965

I have my backup RMAN script called backup_rman.sh. I am on the target database. My catalog username/password is rman/rman. My catalog db is called rman. How would you run this shell script from the O/S such that it would run as a background process?

1 4018

Explain the concept of the DUAL table.

2 6085

What are the ways tablespaces can be managed and how do they differ?

2365

From the database level, how can you tell under which time zone a database is operating?

1 3180

Un-Answered Questions { Databases }

define sql insert statement ? : Sql dba

1024

What is snapshot parameter in ssrs?

150

I am using the switchboard manager in ms access. I am getting an error message "there was an error executing this command." What could be wrong?

909

How to initialize variables with default values?

1240

What are the advantages of stored procedure?

1003

Is mysql workbench a dbms?

1006

What is partition index in sql server?

1120

What is the starting oracle error number?

1052

Why query optimization is needed?

922

How do sql databases work?

995

What is a trigger oracle?

1085

What is a foreign key example?

773

What are hotfixes and patches?

946

How do I uninstall oracle 11g?

1117

How do you create a simple access database?

957

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