what is the difference between primary key & foreign key?
Answer Posted / ibrahim
primay key uniquely identifies records in relation.
in a table only one primary key.But may have more than one
foreign key.
Is This Answer Correct ? | 14 Yes | 7 No |
Post New Answer View All Answers
What is recovery manager(rman) backup in Oracle?
Can objects of the same schema reside in different tablespace?
What is a cursor in oracle?
How to insert a record into a table?
How would you edit your CRONTAB to schedule the running of /test/test.sh to run every other day at 2PM?
Explain oracle data types with examples?
How to Truncate Table in Oracle
What is bulk load in oracle?
What is oracle instant client?
What is backup in Oracle?
How to create a server parameter file?
Illustrate how to determine the amount of physical CPUs a Unix Box possesses (LINUX and/or Solaris).
What is the effect of setting the value "all_rows" for optimizer_goal parameter of the alter session command? What are the factors that affect optimizer in choosing an optimization approach?
What is rowid and rownum in oracle?
Explain a data segment?