Foreign key in DBMS
What do you understand by the term foreign key in DBMS, and why is it employed for?
Expert
A foreign key is employed to establish relationships among relations in the relational model. Technically, a foreign key is a column (or columns) emerging in one relation which is (or are) the primary key of any other table. Though there might be exceptions, the values in the foreign key columns generally must correspond to values existing in the setup of primary key values. This correspondence requirement is made in a database employing a referential integrity constraint on the foreign key.
What do you mean by optimization and performance tuning and explain how does it actually work in the practical projects?
Illustrate the use and application of the DB Miner.
Is it possible that Table Partitioning Require User-Defined Segments in the Sybase?
Justify whether all the Business Objects users build the data providers?
Can we have a report with several data providers?
Write down the differentiation between lookup and filter transformation?
Define the term Event studio?
Describe briefly the four JDBC driver types which Sun defines?
What is Datadriven?
Give a brief note on the term degenerate dimension table?
18,76,764
1953323 Asked
3,689
Active Tutors
1427371
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!