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

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

2 4419

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

3 6592

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

2947

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

TCS,

2 6215

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

1893

What are the commands you'd issue to show the explain plan for "select * from dual"?

2235

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

2441

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

1 3394

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

1 3517

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?

1986

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 7305

Explain the concept of the DUAL table.

3 6138

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

IBM,

2 6664

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

1 4349

What's the benefit of "dbms_stats" over "analyze"?

1 5676

Un-Answered Questions { Databases }

What are data files?

1047

What is the difference between the conventional and direct path loads? : aql loader

1405

Explain a checkpoint and when does it occur?

1017

What is amo? : sql server analysis services, ssas

1095

What is microsoft access made up of?

879

What is nosql vs sql?

1181

Explain sub-query?

959

What is the command used to fetch the first 5 characters of a string?

1213

How can I create a report based on a query? : sql server management studio

1022

Is foreign key unique?

1006

Define view, sequence and index in DBMS.

941

Can pl sql procedure have a return statement?

1034

What is multiple partition?

973

hi,i plan to put experience on PLSQL ,can anyone suggest me for any institutes in bangalore or how to prepare for interviews

2022

What is the method to configure the cache size in mongodb?

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