Define candidate key, alternate key, composite key?
- 30 Answers
- 137557 Views
- IAS, IBM, I also Faced
- E-Mail Answers
Answer Posted / jeff
A candidate key is able to identify a unique tuple in a
relation through an attribute or attribute set.
A foreign key makes sure that a tuple in a relation does
not match a tuple in another relation which does not exist
| Is This Answer Correct ? | 46 Yes | 58 No |
Post New Answer View All Answers
How to replace not in with not exist?
Does QTP Support the Propjects which are running in Dot Net? As we are starting with new project in Dot net need to use automation tool?Please advice & let me know what would be the best.
Explain about query and reporting.
The count() function always returns a int value type what should you do if you need to count rows from a query which you know will return a value that is too large for an int value type?
fact table and dimension table containg one to many relationship or many to one relastionship
Explain about the storage and physical database design?
Explain the role of indexing in databases?
What is the physical representation for a many-to-many relationship?
How is data stored in dbms?
What is dbms explain in brief?
Hi , any one can help me on the same,this is regarding the Informatica Function doc,i want to know how developer is will develop the mapping. pl forwar the any function doc .just for my references. svlc75@yahoo.co.in
How long can an error message be in raiseerror function?
How to generate OIDS
Explain about the database management systems.
What are the constraints on severity level in raiseerror?
