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

What do you mean by e-r model?

1014

Explain all codd's rules for relational database system?

962

What is data independence and also explain its types?

915

Explain the advantages of rdbms?

951

What is normalization and why it is used?

1136

What do you mean by super key, primary key, foreign key and candidate key?

988

What do you mean by denormalization?

1044

What do you mean by conflict serializability in dbms?

937

What do you mean by dml compiler?

1065

What is the difference between delete and truncate command in dbms?

1022

What do you mean by buffer manager?

1064

What is acid property in dbms?

982

What is database management system(dbms) and why it is used?

1035

What is bcnf standard form in dbms?

1045

Explain the difference between dbms and rdbms?

948

Un-Answered Questions { Databases }

What do you mean by group by clause?

1058

What is sql table?

982

What are the types of windows (window style)?

What are the restrictions that views have to follow? : SQL Server Architecture

1021

Define self join in sql server joins?

969

What is the difference between an inner and outer join?

1028

What is the purpose of using timestamp data type?

931

What is metadata in mongodb?

What do you understand by pl/sql packages?

1072

How to delete duplicate rows in sql server?

1120

Which dictionary view(s) would you first look at to understand or get a high-level idea of a given Advanced Replication environment?

1921

What is the use of key-value locking in informix?

What are the three types of database design?

1039

Explain the foreign key?

859

What is the simplest tool to run commands on oracle servers?

1021

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