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

How do you simulate a deadlock for testing purposes

1 10413

what is thae main difference between foreingkey and primarykey

5 9105

which version of mysql can't support stored procedure??

3 6252

I have a table EMP in which the values will be like this EmpId Ename Sal DeptId 11 Ram 10000 10 11 Ram 10000 10 22 Raj 20000 20 22 Raj 20000 20 33 Anil 15000 30 33 Anil 15000 30 I want to delete only duplicate Rows. After Delete I want the output like this EmpId Ename Sal DeptId 11 Ram 10000 10 22 Raj 20000 20 33 Anil 15000 30

DELL,

13 20235

how to get the third quarter of employee details from emp?

CompuTech,

2 8094

How can i insert data inro a table with 3 columns using FORALL?

Oracle,

2 10997

find the third highest salary?

23 45318

i have cleared the nic test...please send me the interview questions if anyone have them.... my email id is v84priya@gmail.com

NIC,

1 1954

how to display only 4 records from a table based on a condition for ex i have a table called products in that nid,prodname are fields i want to display only any 4 records of perticular product plz tell me

6 7705

What is the Tune Query

1 2380

what is autonomouse transaction?

Oracle,

3 8394

i have table students with fields classname,studname select * from students classname studname 1 xxxxx 1 yyyy 1 zzzz 2 qqqq 2 tttt 3 dsds 3 www i want the output should be No of students in class 1 : 3 No of students in class 2 : 2 No of students in class 3 : 2

HCL, ZX,

5 10190

what is the difference between group and having give an example with query and sample output

7 10243

What is Data model and how to prepare a data model.?

TCS,

1 5745

what is a stored procedure and trigger?

3 6258

Un-Answered Questions { Databases }

how many tables will create when we create table, what are they? : Sql dba

1140

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?

1907

8. Sort, Lookup What kind of technique (partition) is used? 9. How can you handle exceptions in job sequencer? 10. How do you apply custom conditions an exceptions (How do you trigger exceptions in job sequence?) 11. I have a job with 3 possibilities? Finish with ok…..Abort…….Warning} How do you handle these in Job sequencer 12. How do you connect both OK and Warning can we? 13. How to find which process is running currently? 14. How do you find the disk usage in UNIX? 15. How do you combine 2 sequential files having same metadata of same file names? 16. How do you implement SCD in Ds? 17. Explain the situation where you have applied? 18. How do you apply new changes to? 19. Difference between change capture and Change apply? 20. Explain Compare Stage? 21. What is Surrogate key? 22. How to solve the problem of null values?

1901

Where can you add custom error messages to sql server?

1203

1. What is Container? 2. Tell me about your project? 3. Which container you are used in your project? 4. What is Surrogate key? 5. How you are implemented it? 6. Difference between Server job and Parallel job? 7. What is your Target Database? 8. What is Source System? 9. Difference between Join and Lookup? 10. Are you maintaining historical data? What is the logic used to maintained to historical data? 11. Do you have documents for mapping?

1844

Is primary key always clustered index?

1092

How raid can influence database performance?

1114

Why use identity in sql server?

1191

Is primary key clustered index?

1015

How to select all columns of all rows from a table in oracle?

1123

What is a scheduled job or what is a scheduled task?

1033

Is inner join faster than left join?

1273

please send me oracle pl/sql exp resume. and also faqs...

2566

How to write a left outer join with the where clause in oracle?

1149

What is a concurrency problem in dbms?

1049

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