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

One table how may column and Primary key

3 5195

How to update salary of employees department wise?

6 14983

what are the methods using performance tunning in sql and pl/sql

2 6511

i have a table like this. i want to output like this c1 c2 c1 c2 1 10 1 10 2 20 2 30 3 30 3 60 4 40 4 100 5 5 5 105 c1 and c2 are columns in a table .i want output like this c2 values are 10,10+20,10+20+30,10+20+30+40.10+20+30+40+5. write a sql query.pls help this i want urgent.

IBM, Loginworks, OFSS,

2 10564

How do you display "13th of November, 17 days left for month end" without hardcoding the date.

3 7237

How do you use collections in procedure to return the resultset?

2190

Which is the best institute in Hyderabad to learn OBIEE and DataStage?Please tell me faculty name also

2224

Psudo colums

HP,

1 4493

how will you see when the database was started using sql prompt?

IBM,

2 6460

how to call forms in parametar forms

2 5969

how to create parameterised form in oracle 10g? and create another form from the value of the form? AND how to assign value to a parameter? sincerly your mamun

2 4774

How to get second highest salary from a table

3 7042

How can i retrieve the pseudoColumn values of a table in sybase? In oracle, we can get the same as 'ROWID'. Likewise in sybase which one is pseudo column?

1 6762

In TeraData We have 5 SQL queries, without using BTEQ how can we execute those queries?

CTS,

1 4758

If we execute an query in MLOAD it's ran successfully, my questions is after successfully ran MLOAD. In error tables we can see anything there! is it possible than what are they?

CTS,

3 5988

Un-Answered Questions { Databases }

How exception is different from error?

982

Mention what is cluster?

Difference between the “verify” and “feedback” command?

1319

What is the sql query to concatenate column values from multiple rows in oracle?

1007

What is the difference between push and pull subscription? : sql server replication

1162

How do you troubleshoot errors in a SQL Server Agent Job?

1019

Explain what is “asynchronous” communication in sql server service broker?

882

Compare sql & pl/sql

1062

What is scrollable cursor?

992

Why we use sql profiler?

921

How to rename an existing column in a table?

1000

Explain the relational database management system (rdbms)?

1037

When should an artificial (or derived) primary key be used?

550

What does a dba do all day?

510

Can we check locks in database? If so, how can we do this lock check?

904

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