Explain the difference between a primary key and a unique key?

976

Define oracle database

1049

How can we create the complete backup of data in the oracle.

2161

Relation between a controlling area and a company code?

1163

What are commit and rollback in sql?

1135

What is the purpose of relationship validity period/date?

1031

Define MapReduce?

699

Which companies use magento?

1

What is the use of dclgen in db2?

1085

What is an electron?

990

Is it possible to trigger a notification from maintenance plan? How?

871

How do I handle request/response using jms? : BEA Weblogic

1055

Can a apex trigger call a batch class in salesforce?

499

What are the data types in postgresql?

904

define the process of automation in object server?

954