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 ora 24313?what is the procedure to exclude that error?

1 2626

There are two tables (T1, T2) with different rows. Find the output of query. Select count(*) from T1,T2.

Amdocs,

3 9412

how to find 5th row ?

10 17708

how to retrieve last tree records from table? select *from emp where rownum > (select count(*)-3 from emp); i am using this query to get last three records from table but its not giving any output, so please tell me what is the error in this query.

16 24355

Please send me Informatica 8.1 certification dumps, my mail id mona85gupta@gmail.com

1934

What is the difference between a Table and a View?

3 6992

what is difference between sql plus and sql*plus? (not sql and sql plus).

1 3956

how do you restrict number of rows for a particular value in a column.For example:there is a table called fruits,having apples,bananas ,papayas.I dont want to have more than 100 apples in that table ,so how can u restrict number of rows for apple to hundred?

6 11684

where we have to use ON clause and where we have to use USING clause in JOINS

2 4349

Using the relations and the rules set out in the notes under each relation, write table create statements for the relations EMPLOYEE, FIRE and DESPATCH. You should aim to provide each constraint with a formal name, for example table_column_pk.

Wipro,

1 1903

Using the relations and the rules set out in the notes under each relation, write statements to create the two sequence generators specified in the notes.

Wipro,

1 2180

1. Display all the rows and columns in the CLIENT table. Sort by client name in reverse alphabetical order.

Wipro,

2 6529

2. Display the item number and total cost for each order line (total cost = no of items X item cost). Name the calculated column TOTAL COST.

Wipro,

2 4944

3. Display all the client numbers in the ORDER table. Remove duplicates.

Wipro,

1 4477

4. Display the order number and client number from the ORDER table. Output the result in the format. Client ordered

Wipro,

1 4825

Un-Answered Questions { Databases }

How do I create a trace in sql server?

1104

What is the latest version of postgresql?

946

1. Tell me about your self? 2. Latest Project Introduction? 3. Difference between server jobs and parallel jobs? 4. Seq-Seq Explain its behavior and execution mode and which parallelism technique is used? 5. What is padding characters? 6. Seq-Seq, Seq-Copy-Seq which one is the best and efficient? 7. How many reject links do we have to a transformer? 8. How many reject links to join stage? 9. Difference between join and lookup? 10. How to design PX routine? 11. How can we call job in another job? 12. Difference between batch and sequencer? 13. Which Database is used? 14. What is change capture? Give briefing of that? 15. What is change Code? Explain? 16. How you call UNIX in Ds? 17. How do you call JCL in UNIX? 18. How do you pass the job status of one job to another job? Have designed any job sequencer? 19. How do you find a file in existed directory? 20. How can you call parallel jobs in transformer? 21. Execution of jobs in command line? 22. Tuning of sql queries? 23. What is orchestrating metadata? 24. What are junk dimension? 25. What are the third party tools you are used? 26. What are the system variables you have used? IBM 1. What is virtual dataset? 2. How do you handle reject link to a peek stage? 3. What is transaction table? 4. Which one is the efficient from the following? a. ODBC enterprise b. Oracle enterprise 5. How can you extract data from excel sheet? Do you know how to parameterize, this option? 6. Six pages of complex query I have, how do you simplify this query? 7. Difference between dataset and lookup file set?

1970

How to use values from other tables in update statements using oracle?

1141

Any work done in oracle workflow builder. Did you customize or build a new workflow?

explain different types of backups avaialabe in sql server? Given a particular scenario, how would you go about choosing a backup plan? : Sql server database administration

1118

What are wait types?

1223

What are the kinds of subquery?

1087

Re: Where can i get informatica certification Exam dumps and details? please forward it to emailid:

2300

You have a stored procedure, which execute a lengthy batch job. This stored procedure is called from a trigger you do not want to slow the data entry process you do not want trigger to wait for this batch job to finish before it completes itself what you can do to speed up the process?

1202

Explain “row_number()” in sql server with an example?

1062

what is spatial nonclustered index

1050

Does view occupy space?

1003

How can we solve concurrency problems?

1112

Can delete statement be rollbacked?

1041

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