what is the difference between primary key & foreign key?
Answer Posted / muneer
Primary Key is unique Key entire the table and which is
also NOT NULL
where as foriegn key is the null & which references the
primary key .
Is This Answer Correct ? | 147 Yes | 28 No |
Post New Answer View All Answers
What do you mean by cdb and pdb in oracle 12c?
How do I spool to a csv formatted file using sqlplus?
What is tns service name?
Explain the use of consistent option in exp command.
Explain an exception and its types?
What happens if variable names collide with table/column names?
What spfile/init.ora file parameter exists to force the CBO to make the execution path of a given statement use an index, even if the index scan may appear to be calculated as more costly?
What is the max number of columns in an oracle table?
Explain the difference between a procedure and a function?
How can windows applications connect to oracle servers?
What to do if the startbd.bat failed to start the xe instance?
how to handle exceptions in post production
List the parts of a database trigger.
What are the benefits of ordbms?
What is an oracle recycle bin?