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?

1 357

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

1 290

What is CRUD Operations?

1 279

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

1 315

How to Ensure Data Integrity in a Relational Database?

291

Explain the Difference Between OLTP and OLAP Databases.

1 279

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

1 322

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

1 325

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

1 333

10 How to Handle Data Migration Between Different Databases?

1 344

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

1 402

Explain the Importance of Data Normalization.

1 352

How to Perform Data Cleaning and Preprocessing?

1 381

What are the Common SQL Functions Used for Data Aggregation?

1 374

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

1 366

Un-Answered Questions { Databases }

What does count (*) mean?

717

Is sql microsoft?

742

What are different types of triggers?

772

What is the maximum number of instances in 32 bit and 64 bit sql server 2012?

764

Why is access important for business?

651

What is difference between data and database?

780

when we are importing items in inventory, showing errors, Oracle support suggested us for running scripts & also suggested if we run scripts, iprocurement applicaation if is there it will show shared and if we go in future for iprocurement, it wont work. So kinldy suggest any functional solution.

1718

Define Wed Edition in SQL Azure?

How to check duplicate data in mongodb?

How many tables can you join in sql?

736

Restore database (or database table) from backup.

781

20. Using a set operator, display the client number of all clients who have never placed an order.

1989

How do I create an extended event in sql server?

707

How to avoid duplicate entries in the forms?

What are the differences between triggers and stored procedures?

777

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