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

Oracle (3259)
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MS Access (429)
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Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
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Neo4j (82)
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Database Management (1411)
Databases AllOther (288)

Databases Interview Questions

Questions Answers Views Company eMail

How many primary keys can a table have?

1010

Does truncate remove indexes?

1038

How can we find duplicate records in a table?

948

Can we insert data in view?

969

How do I remove all records from a table?

1077

Why truncate is faster than delete?

1115

Are subqueries faster than joins?

1023

Does truncate free space?

1017

Can a foreign key be null?

1093

How do you respond to dementia behavior?

972

Can we create clustered index without primary key?

968

How many types of index are there?

1044

Is primary key an index?

996

How do you optimize a query?

1008

Is natural join same as inner join?

946

Un-Answered Questions { Databases }

What do you understand by a database object?

1068

How do you handle datasets larger than 50 gb?

162

What is fmtonly in sql?

1089

What is sql in oracle?

1066

What is pl sql block structure?

1044

How data are stored in database?

961

You are getting busy buffer waits. Is this bad? How can you find what is causing it?

540

What do you mean by authentication modes in sql server?

1087

What is a database? Explain

1116

What do you mean by group by clause?

1048

What is sql in java?

1092

What do you mean by dml compiler?

1053

How to generate create function script on an existing function?

1122

Can you explain what is indexed view? How to create it?

908

What are binary string data types in ms sql server?

1301

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