what is the difference between primary key & foreign key?
Answer Posted / guest
Primary key is unique
primary key is not NULL and
foreign key is NULL
foreign key reference as Primary key in another table
Is This Answer Correct ? | 250 Yes | 62 No |
Post New Answer View All Answers
I have a parent program and a child program. I want to write a statement in Exception Block of the parent program so that when the statement in the exception block is executed, the control goes to the next statement in the parent block bypassing the child block.How do i do that?
Can we protect our pl/sql source code?
Can you tell me how to add new column in existing views?how?How is possible?
various types of hints and their usage
What privilege is needed for a user to query tables in another schema?
How to drop an index in oracle?
How can we find out the current date and time in oracle?
In AP we done Customizations for Late Payments Charges. For Reporting Purpose What are the Documents Prepared for Customer Understanding??
How to write a query with an inner join in oracle?
Calculate difference between 2 date / times in oracle sql?
Typically, where is the conventional directory structure chosen for Oracle binaries to reside?
Why do I get unexpected characters from 8-bit character sets in weblogic jdriver for oracle?
What is the quickest way to export a table to a flat file?
 What are the oracle DML commands possible through an update strategy?
How to divide query output into groups in oracle?