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 Virtual Memory?

1 4128

What is the disadvantage of User defind function?

CybAge,

1 2365

Please explan Why static query is more faster than dynamic query ?

2 7294

how we can count records as a group of days like sum of records for(four mondays),(four tuesday)........ in a month. group the column for weekdays.

1 4046

how to delete duplicate rows in sql server 2005?

EWIT, Reliance,

2 5544

please tell me the query to get details of the employee having the second largest salary

247Customer,

11 15106

Can anyone help me to create a good mysql database schema with an example. Thanks, Sekar.jr

1 3321

What is excution Plan in sql server

CarrizalSoft Technologies, TCS,

1 6597

What is Index Segmentation ?

TCS,

1 7380

hi, how to match retrieve the unmatched records from 2 tables in which we dont have any primary key. example : table1 has 1,2,3,4,5 and table2 has 1,2,3,4,5,6,7,8,9,10 and i want the numbers from 6 to 10 to be displayed and should not come as null. i need the numbers. please reply as soon as possible.

4 8462

hi, how to link a text file and a .rpt file in my tables of sql server and to retrieve those records for further use. reply me as soon as possible.

1 2144

1.can we set the more than 1 primary keys for a table? 2.please give me the difference between Cluster Index and non-Clustered Index 3.can we use query like this "Select * from Table1,Table2;"

8 9353

type type_name is table of varchar2(30) index by binary_integer for the above type you have to create a identifier... like identifier_name type_name; for the above type you can use the below methods..like first , last , prior, next , delege..etc...like this.. if you create a cursor...like cursor cursor_name is select * from scott.emp; is there any methods like above to use prior, fist , last , next , trim ,etc...

Satyam,

1 7391

what is the difference between varray and table data type..please expalain with some examples... under what situation you will go for varray..instead of index by table...

HCL, Satyam,

1 5425

declare v_count number(8,3); v_sal scott.emp.sal%type := '&P_sal'; cursor cur_name is select sal from scott.emp where sal between (v_sal-100) and (v_sal +1000); begin v_count :=nvl(sql%rowcount ,0); if v_count = 0 then dbms_output.put_line('no records are fetch in the given sal range'); else dbms_output.put_line('There is/are '||to_char(v_count)|| ' salaries are selected in the given range '); end if; end; in the above programm .....for any sal range ....always it shows the following message.. no records are fetch in the given sal range please find the mistake and share with me...with thansk and regards..sarao....

Satyam,

3 8395

Un-Answered Questions { Databases }

What is an indexed view?

1018

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

2566

Can you index views?

951

Equi join and non equi join is possible with sql server?

1126

How to convert numeric expression data types using the cast() function?

1142

Can we shrink data file in sql server?

1123

what is the Ticketing tool used in Wipro technologies at Bangalore...???

8225

Hi am new to PLSQL & facing problems in writing code like in SP, Functions, so any one having some SP coding with in depth explanation please share with me my Email ID suvarnaatsuvarna@rediffmail.com Or taking tanning on this please do contact me

2088

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?

1977

When should you use an instead of trigger?

1042

Does view occupy space?

1005

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

1147

what are the advantages of sql ? : Sql dba

1136

What are the different types of subquery?

1228

Why and when do stored procedure recompile?

1052

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