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 2036

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

1 1799

What is CRUD Operations?

1 1752

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

1 1875

How to Ensure Data Integrity in a Relational Database?

1897

Explain the Difference Between OLTP and OLAP Databases.

1 2084

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

1 2073

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

1 1958

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

1 1940

10 How to Handle Data Migration Between Different Databases?

1 2092

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

1 2635

Explain the Importance of Data Normalization.

1 907

How to Perform Data Cleaning and Preprocessing?

1 2654

What are the Common SQL Functions Used for Data Aggregation?

1 2530

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

1 2584

Un-Answered Questions { Databases }

Explain relational data?

923

How to save query output to a local file?

1026

What are the different parts of a package?

1115

Why would someone use a database?

921

How to define a data field as not null?

1107

Is Odi used in oracle products?

668

Explain the difference between a primary key and a unique key?

967

What is the partitioning method?

1018

How do I check if log truncation is blocked in sybase?

822

How can we check the sql server version?

1065

What are the different types of triggers in mysql?

963

What is a mongodb instance?

What is the Maximum size for a table in PostgreSQL?

1526

What is the importance of primary key in ms access?

902

discuss about myisam key cache. : Sql dba

1021

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