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Databases Interview Questions
Questions Answers Views Company eMail

i have a question here... As of my knowledge, when we apply an index (b-tree)on a column, internally it arranges the data in b-tree format and do the fetching process correspondingly... and my quetion is... How a bit-map index arranges the data internally when applied on a column?IS it in b-tree format or whatelse?

Oracle,

1911

which institute and which faculty is providing best training for oracle sql, plsql in hyderabad

4 5396

I have a table emp , Fields with empname,dnname,dno,salary. now I want copy distinct salary with all emp detail from emp into new table which is not already exist in database. how would I do this ?

Techno Labs,

2 3976

how to copy only distinct data into another table which is not already exist in database?

Spectra,

2 4234

difference between function and procedure

Cognizant, HCL, TCS, Theorem,

3 5253

I have single column in a file. Input 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 my output is file 1 have 1,2,3,10,11,12 file 2 have 4,5,6,13,14,15 and file 3 have 7,8,9 how is it possible in datastage

IBM,

1512

First input columns brand, mt, re values are ov, 1,re vg, 2,re wu ,3,re. Second input columns are brand, mt, cx their records are ov,4,vg ,5,cx Wu, 6,cx and third input columns brand, mt, rt values are ov,7,rt vg, 8,rt wu, 9,rt but my output is brand, re, cx,rt values are ov, 1,4,7 vg, 2,5,8 wu, 3,6,9

IBM,

1704

While inserting/updating million of records into a database table, how do I came to know how many records has been inserted or updated successfully so far?

HSBC,

2 7945

How to fetch records from a partitioned table?

HSBC,

2 8019

How many triggers can be implemented for a table?

HSBC,

3 6959

My select statement is not working as expected, So, to overcome from such issues what are the steps needed to be taken care?

CG,

2 4426

I have a table with 1 million records out of which 10,000 records are of unique records, then if I will implement index, then which type of index shall I use and why shall I use?

HSBC,

2 7450

Can we use commit or rollback in trigger? If yes, then how. Please explain with a suitable example?

HSBC,

5 13472

2) Consider a Table name A which has below records ID --- 5 5 5 5 5 Consider another table B which has below records ID -- 5 5 5 5 5 5 5 5 How many rows will be returned by each of the below queries a) select * from A inner join B on A.id = b.ID b) select * from A left join B on A.id = b.ID c) select * from A right join B on A.id = b.ID

Synechron, TCS,

2 4857

I have 3+ Years experience HR with Technical Recruitment Industry. Now i would like to learn oracle HRMS Models of all aspect. please suggest any one, which institution is best for oracle HRMS practical with real time teaching in Chennai, Tamilnadu. What are the basic stat up to learn Oracle HRMS with Core strongly?

Oracle,

1 3061


Un-Answered Questions { Databases }

How will you run ms_batch file in forms?

1


What do you understand by functional dependency and transitive dependency in dbms?

816


What are rows and columns?

969


What are the 6 major components of microsoft access?

769


name 3 ways to get an accurate count of the number of records in a table? : Sql dba

1023


in a table is b in column k (manikanta,sivananda,muralidhar) i want result like (mnikanta,sivnanda,murlidhar) please slove it

1470


Which are new data types introduced in sql server 2008?

1005


Enlist some commands of dcl?

900


How can you customize to mongo shell prompt?

5


Difference between Inner vs outer joins?

910


How to enforce security in sql server? : sql server security

1055


List similarities and differences between oracle & sybase.

911


Explain what role entity and relationship play in an ER diagram.

1034


Can you have a composite foreign key?

767


Please explain the main features of couchdb?

1