Databases Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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Databases Interview Questions

Questions Answers Views Company eMail

What is the diff between Truncate table / delete

purge

TCS,

3 15858

what is the age limit for groups1 examination

APPSC,

2322

What is the difference between an Oracle Schema and an Oracle Instance?

IBM,

3 9180

How can one skip any number of rows while loading the DB tables with SQL Loader? Similarly how can one skip any column?

IBM,

1 3725

What is the exact use of Collections?

1 2197

sql command 2 know current database

4 6899

select name of emplyoee whose total salary is 130 from following table. id name salary 1 a 100 2 b 20 3 c 50 1 a 30 2 b 70 Post the resulantant Query?

7 9088

a. Can you delete data from a View. b. If Yes, can you delete it if there are multiple tables c. If No, can you delete if there is single source table which is joining.

CGI,

1 7938

a. Can you delete data from a View. b. If Yes, can you delete it if there are multiple tables c. If No, can you delete if there is single source table which is joining.

CGI, IBM,

4 10630

What are the difference between Functions/Stored Procs and Triggers and where are they used.

CGI, TCS,

1 6190

Can you have multiple SPs with the same name on a database?

CGI, Quest,

2 7138

Can you create a table with Primary Key not as the clustered index.

CGI,

2 7751

Can you have multiple SPs with the same name on a database?

CGI,

6 12332

Q1.all the depts which has more then 10 empls? Q2.all the dept which does not have any emply? Q3 all the emp which does not have any dept? Q4 get all the emply detais with the dept details it dept is exit otherwise any emp details? Q5 how to debugg the dynamic sql and packages?

KPIT,

4 7816

what is the difference between oracle enterprise edition and oracle express edition?

2 7247

Un-Answered Questions { Databases }

How to remove duplicate rows from table except one?

1070

If a cursor is open, how can we find in a pl/sql block?

1225

How to start an oracle instance?

1086

This question asked during interview, 2) At the end of each month, a new table is created for each bank that contains monthly metrics consolidated at the account level. The table naming convention is bankX_YYYYMM where X represents the numeric designation of the bank and YYYYMM indicates the 4 digit year and 2 digit month. The tables contain the following fields: name data type description account text account number registered boolean indicates whether the account is registered num_trans integer number of transactions made during the time period spend numeric(9,2) total spend during the time period a) Write a SQL query that will display the total number of transactions and total spend for "Bank1" during the 4th quarter of 2009. b) Write a SQL query that will display the total number of transactions and total spend at "Bank1" and "Bank2", broken out by registered vs. non-registered accounts, during January 2010 not sure what is correct answer and how to solve?

2545

What is clustered index

1069

how to escape special characters in sql statements? : Sql dba

1097

What are the pros and cons of putting a scalar function in a queries select list or in the where clause?

1277

What is a concurrency problem in dbms?

1035

What is the difference between case version and decode version?

1091

Have you written applications to retrieve stored images in a table?

1071

Is there some bulk load or other way to import a lot of data fast?

923

Can we rollback truncate?

1058

What is self contained sub query?

1130

Design database draw er diagram for a certain scenario ?

4635

Who proposed the relational model?

1023

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