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

Oracle (3258)
SQL Server (4518)
MS Access (429)
MySQL (1402)

Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)

DB Development (113)
SQL PLSQL (3328)
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?

1 313

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

1 255

What is CRUD Operations?

1 246

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

1 279

How to Ensure Data Integrity in a Relational Database?

270

Explain the Difference Between OLTP and OLAP Databases.

1 249

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

1 281

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

1 286

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

1 291

10 How to Handle Data Migration Between Different Databases?

1 298

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

1 310

Explain the Importance of Data Normalization.

1 286

How to Perform Data Cleaning and Preprocessing?

1 290

What are the Common SQL Functions Used for Data Aggregation?

1 317

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

1 297

Un-Answered Questions { Databases }

How does a trigger work?

727

Is ms access easy to learn?

623

What should a dba know?

359

What is a production dba?

393

How do I make a pgadmin server?

572

How many sql dml commands are supported by 'mysql'?

633

Explain about Views?

785

how can you get actual data change values from previous transactions in oracle?

809

What is a password file in a database and why is it required when a user can be authenticated using data dictionary tables?

Define database.

751

Using the relations and the rules set out in the notes under each relation, write statements to create the two sequence generators specified in the notes.

1848

What is dcl in sql?

706

How to check if postgres is running?

635

What is indexing and what are the different kinds of indexing?

666

What command is used to delete the data from the table without deleting the table structure?

637

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