Databases Interview Questions
Questions Answers Views Company eMail

How many primary keys can a table have?

650

Does truncate remove indexes?

662

How can we find duplicate records in a table?

624

Can we insert data in view?

639

How do I remove all records from a table?

706

Why truncate is faster than delete?

711

Are subqueries faster than joins?

681

Does truncate free space?

649

Can a foreign key be null?

727

How do you respond to dementia behavior?

663

Can we create clustered index without primary key?

652

How many types of index are there?

685

Is primary key an index?

657

How do you optimize a query?

671

Is natural join same as inner join?

628


Un-Answered Questions { Databases }

How to configure the cache size for wiredtiger in mongodb?

1


Can a table contain multiple foreign key’s?

685


What is sql server and ase?

662


What is a schema in postgres?

519


Do you know the cursor optimization tips?

698






What is the sql query to find the employee who has Nth maximum salary?

4562


What is denormalization and why would someone consider doing so?

550


What are the steps you should follow to start sql server in single-user mode?

596


What is connection pooling in oracle?

656


Explain the rollback statement?

708


How delete all records from table in sql?

674


What are the differences between primary key and unique key?

631


Why is there a performance difference between two similar queries where one uses union and the other uses union all?

647


What is mysql shell?

625


What is policy management?

691