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 differece between union and union all

6 10498

if monday take full backup and tuesday it was cumulative backup and wednesday we taken incremental backup, thursday some disaster happen then what type of recovery and how it will take?

1 3584

when we login sql editor using username and password then it says this error "could not resolve service name" then what can we do at client side.( here thing is tnsnames.ora file is ok till yesterday and worked well, but now it giving error.)

2 5550

If CPU is very slow What can u do to speed up?

1 4610

how to eliminate duplictes in column except group and section?

iFlex, TCS,

2 7264

Is trigger fired implicitely?

2 5847

Can any one tell me how to increase the performance of a sql query ie what are the performance tips in creating or writing a sql query !!?

eBay,

3 12590

How to improve the performance of a pl/sq stored procedures or functions or triggers and packages ?

IBM, TCS, UHD,

12 29865

how do we find every fifth record in a table

Aspire, HCL,

14 19413

if we give update table_name set column_name= default. what will happen?

iFlex,

4 10042

if we give update table_name set column_name= default. what will happen? its given in pl sql block.what will hapen?

iFlex,

5 11957

how will u find statistics of a database objects?

iFlex,

2 8821

How can we expand Parameter Form Canvas on Reports 6i?

ABB,

1 2495

Hi Every One , What is the table Space in Oracle Database ? waiting for answere and thankyou

8 11877

What is the appropriate number of test cases that you can write on a database?

Microsoft,

2 7206

Un-Answered Questions { Databases }

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

1035

What is the current version of postgresql?

1175

Have you used lexical parameters in reports?

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?

1985

what is dbms? : Sql dba

1061

Why we use the openxml clause?

1073

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

1154

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?

1210

How can you append an identity column to a temporary table?

1068

What is temporary table in sql server? Why we use temp table?

1017

What is sql or structured query language?

1222

in user parameter property we have list of values.can we write select query for binding? for example:: select empno from emp where deptno=:deptnum :deptnum is first parameter it displays distinct dept nos. if i do like this it is giving error:: bind variables are not allowed in the select statement

2211

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?

1847

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

What are the two main functions of queries in databases?

1526

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