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)
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Firebird (5)

Database Management (1411)
Databases AllOther (288)

Databases Interview Questions

Questions Answers Views Company eMail

You loss one datafile and DB is running in ARCHIVELOG mode. You have full database backup of 1 week old and partial backup of this datafile which is just 1 day old. From which backup should you restore this file?

2 4336

what is architecture of your datastage project??? i came across this question many times in interviews in specific what can i answer plz help me

IBM,

1 4188

can i create trigger on synonym is it possible or not please help me

CGI,

4 10996

Can I recover a damaged SQL Server 2008 database with the undamaged .mdb and .ldf files?

Apple,

3 6793

I Defined SP1, Sp2 (sp=StoreProcedures)In Package Specification but I Implemented Sp1, sp2, sp3, sp4, sp5 then What type of Error You will find????

Infosys,

3 11673

If i insert record in table A and these record should update in table B by using Trigger.How to achieve this.

Saama Tech, TCS,

4 10717

Can we create SP inside SP ? If no Y ? If yes Y ? Explain with an example ?

IBM, L&T,

3 7076

In the below query i have performed the commit transaction statement but still the values after the save are not saved. Can you please let me know why are the statements after save are rolled back even after commiting the data. help me with the understanding declare @trans2 varchar(10)='transaction2' begin transaction @trans2 insert into emp values(100,'xy',600); save transaction @trans2 insert into emp values(200,'pq',700); insert into emp values(300,'pq',800); commit transaction @trans2 rollback tran @trans2

AllState,

1 3441

What are joins, explain all types of joins?

Bravura Solutions,

2299

Do you know about aggregate functions? What is row num function? Can it be used all databases?

Bravura Solutions, Cap Gemini,

1 4515

Write query to fetch second maximum salary from employee table.

Bravura Solutions, HCL,

4 7463

What is your daily office routine?

Data Vision,

2266

What is difference between Sql server and MySql database? It may be silly question but i really dont know.

2119

Suppose database is running slow, what will you do?

2520

what is scan listener.

2228

Un-Answered Questions { Databases }

What is collation?

1140

What are the different sql commands?

1073

Which database does facebook use?

977

What are the different types of joins in sql?

1787

What is the difference between for auto and for nested?

1001

What does subquery mean in sql?

1049

What is a sql select statement?

1039

Explain external key management in sql server 2008

888

What is the role of 8 analysers in mongodb?

What are the six database objects?

910

What is the command used to fetch first 5 characters of the string?

1399

explain engines?

906

Explain where clause?

985

what are the different functions in sorting an array? : Sql dba

1017

How can you maintain the integrity of your database on instances where deleting an element in a table result in the deletion of the element(s) within another table?

1134

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