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?

2393

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

2121

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

1 3594

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

2426

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

1 3727

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

1980

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

2 5287

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

2710

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?

2150

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

1919

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 8971

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 4023

Explain the concept of the DUAL table.

2 6086

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

2369

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

1 3186

Un-Answered Questions { Databases }

You have taken import of a table in a database. You have got the integrity constraint violation error. How you are going to resolve it.

590

How to know, what indexes exist in a collection?

What is extended stored procedures?

967

what authentication modes does sql server support? : Sql server database administration

1119

Why is sql server log file full?

1041

WHEN CURSOR MOVES FROM ONE FORM TO ANOTHER FORM, HOW MANY TRIGGER WILL BE FIRED AND WHAT ARE THEIR SEQUENCE?

2317

describe mysql connection using mysql binary. : Sql dba

1071

can u combine pipeline parallelism and partition parallalism? how and whan?

2337

You get a call from you backup dba while you are on vacation. He has corrupted all of the control files while playing with the alter database backup controlfile command. What do you do?

605

What is use command in mysql?

1046

Explain about sybase 365?

869

How to list all user accounts in oracle?

1029

What is a dbms wizard?

1023

Why packages are used in oracle?

1070

What is analyze command used for?

1078

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