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 is group by in sql?

1038

Why we use triggers in mysql?

956

What is sql procedures and functions?

965

Why trigger is used in sql?

930

What is rownum in sql?

981

Why self join is used in sql?

932

What is the difference between count 1 and count (*) in a sql query?

925

What is the use of a view in sql?

938

What is clustered index sql?

952

What is the trigger in sql?

914

What are sql queries used for?

993

What are sql triggers used for?

968

What is cte sql?

934

What is sql indexing?

969

What is a full join sql?

990

Un-Answered Questions { Databases }

What are the differences in Clustering in SQL Server 2005 and 2008 or 2008 R2?

993

What are the differences between “row_number()”, “rank()” and “dense_rank()”?

1065

What happens to a statement batch if there is a compilation error?

913

How do I find mysql database?

870

What is an artificial (derived) primary key? When should it be used?

850

What is the purpose of tables, private synonyms and public synonyms in Oracle?

995

What is the difference between translate and replace?

1017

Is postgres is free?

755

What's the information that can be stored inside a bit column?

954

List out the differences between the clustered index and non-clustered index in sql server?

953

What is the driver name for postgresql?

762

How many primary keys are possible in a table?

887

Is postgresql a nosql database?

1100

What are the rules to be applied to nulls whilst doing comparisons?

1287

If you are not sure what command does a particular unix function what is the best way to determine the command?

522

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