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 a Database Schema and Why is It Important?

1 1937

Explain the Difference Between a Primary Key and a Foreign Key.

1 1704

What is CRUD Operations?

1 1661

What are the Different Types of Joins and How do They Work?

1 1792

How to Ensure Data Integrity in a Relational Database?

1847

Explain the Difference Between OLTP and OLAP Databases.

1 1950

What are the ACID Properties in a Database and Why are They Important?

1 1966

Describe the Process of ETL (Extract, Transform, Load).

1 1877

What is a Data Warehouse and How is it Different from a Traditional Database?

1 1852

10 How to Handle Data Migration Between Different Databases?

1 1995

What is a Relational Database and How does it Differ from a NoSQL Database?

1 2145

Explain the Importance of Data Normalization.

1 819

How to Perform Data Cleaning and Preprocessing?

1 2079

What are the Common SQL Functions Used for Data Aggregation?

1 2114

Describe the Process of Connecting a Database to a Data Analysis Tool.

1 2133

Un-Answered Questions { Databases }

Explain about managing data tasks?

794

What is the usage of the distinct keyword?

1166

What is mysql data directory?

922

How to use transactions with couchdb?

Which free database is best?

792

What is raid and what are different types of raid levels?

1076

Mention the command syntax that is used to view mongo is using the link?

How does one use sql*loader to load images, sound clips and documents? : aql loader

1117

What are local and global variables and their differences?

1044

Can you edit the .rdl code associated with a linked report?

149

What is the need to provide size option on create collection?

What happens internally when the user types userID/password@string in SQL PLUS Thanks-Bhaskar

4478

What is a transact-sql statement batch in ms sql server?

945

What does select count (*) mean in sql?

961

Explain transaction server isolation?

979

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