Interested to Buy Any Domain ? << Click Here >> for more details...
Define candidate key, alternate key, composite key?
- 30 Answers
- 145624 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
What is database design and development?
Explain the rollup operator?
There is a trigger defined for INSERT operations on a table, in an OLTP system. The trigger is written to instantiate a COM object and pass the newly insterted rows to it for some custom processing. What do you think of this implementation? Can this be implemented better?
Write the fastest query to find out how many rows exist in a table?
You are testing the performance of a query the first time you run the query, the performance is slow. the second time you run the query, the performance is fast. why is this?
What is data modeling with example?
What is the maximum length of an extended property?
What are the key features of dbms?
How to customize error conditions.
Explain about post-relational databases?
Explain about a primary key?
How you can make a parameterized view?
How to use timestamp datatypes
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
Explain about network model?
