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

1. Which is an aggregate function? a. Union b. like c. max d. Rank

Fintellix,

1 2174

2. Select A.A from ( select 1 as from dual Union select 1 as from dual)A Full outer join ( select 1 B from dual Union select 2 B from dual)B On A.A=B.B

Fintellix,

2 7367

3. Select sum(a) sum_1,max(a) max_1 ,count(a) count_1 from ( ( select 1 a from dual union all Select to_number(‘2011’) a from dual union all select 1 a from dual) union select 2 b from dual);

Fintellix,

1 2414

4. Select sum(A.salary) +sum(B.salary) as TOT_SAL from ( select LEVEL emp_id,level*100 salary,case when mod (level,2)=0then 2 else null end dept_id from dual connect by level<6 )A right outer join (select level emp_id ,level*200 salary ,case when mod (level,3)=0 then 2 else null end dept_id from dual connect by level<6)B On A.dept_id=B.dept_id And A.emp_id=B.emp-id;

Fintellix,

1 1949

7. Where would you look for errors from the database design?

Fintellix,

1 2261

Can any one explain me when i execute below query.. select months_between('07-JUL-12','10-FEB-12') from dual; Out put:- 4.90322581 How oracle calculate?

920

HI Friends Myself Manoj,i am from bengaluru.i have 1 yr of exp in PLSQL but not upto the mark..now attending interviews but m not able to clear even 1 round..i have attended 3 interviews till today.purpose of writing this query is,i want to know the intreview topics that interviewer going to ask frequently,mainly SCENARIO based questions.IF anybody have any PLSQL projects please give it to me,it will helps me alot.Thanks for your patience.

979

During insert operation in Netezza Connector, if we give direct option as Yes , is there any issue?

941

I need a query to list out "Subinventory Transfer" record from Oct 2016 to Oct 2017 for few users

832

Whis is not false in primary key?

Fintellix,

966

Can we call a function that has out parameter in select statement

Nagarro,

778

Call by value and call by reference in procedure and function, with NOCOPY.

Nagarro,

827

If we delete pack Spec what will be the status of pack Body ?

Nagarro,

960

Delete duplicate rows without using rowid.

Nagarro,

1058

What is Histogram?

NIIT,

1093

Un-Answered Questions { Databases }

What are the properties of a database?

473

What is hypermedia database?

442

What is tkprof and how can we use it?

What is a synonym for manipulation?

531

What are the various ingredients of sga?

274

Are null values the same as that of zero or a blank space?

564

What are bind variables and why are they important?

274

What is “begin trans”, “commit tran”, “rollback tran” and “savetran”?

573

How many tables can you join in sql?

522

what are the differences between require and include, include_once and require_once? : Sql dba

517

What is microsoft access made up of?

435

Explain the structure of objectid in mongodb.?

What is the difference between hashed file stage and sequential file stage in relates to datastage server?

648

What is data modelling in sql?

512

Can you explain various data region available in ssrs with their use?

538

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