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

How to Optimize Database Queries for Performance?

1 2678

What are Stored Procedures and When would we Use Them?

1 2701

How to Handle Missing Data in a Database?

1 2092

Describe the Process of Feature Engineering using SQL.

1 1042

What are the different types of databases?

1 1218

What are ACID properties in databases?

1 2857

What is the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN?

1 1217

What is indexing, and how does it improve performance?

1 1092

What is a deadlock in SQL? How can you prevent it?

1 3145

What is the CAP theorem?

1 1112

How would you optimize a slow SQL query?

1 3140

How do you handle duplicate records in a database?

1 1059

How would you design a database for an e-commerce website?

1 1060

How do you ensure database security?

1 1205

What would you do if a database crashes in production?

1 990

Un-Answered Questions { Databases }

What is a schema sql?

1152

How do I create a database in access 2010?

864

What is variable dbms?

958

What is slow query log in mysql?

1107

How do I clear the screen in mysql?

1007

What is "transparent DBMS"?

860

What is normalization sql?

1053

How many rows mysql can handle?

936

What is the difference between nvl function, ifnull function, and isnull function?

1103

How do I view tables in mysql?

984

What is Fully Functional dependency?

949

Can files be stored in a database?

937

What is the order of defining local variables and sub procedures/functions?

1061

What is difference between microsoft sql and mysql?

991

Can a view be mutating? If yes, then how?

1026

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