Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...

  1. Categories >> Software >> Databases >> Oracle >> Oracle General
  2. Suggest New Category

what is the difference between primary key & foreign key?

Question Posted / vasavi

Answer Posted / vasavi

primary key does not allow duplicate and null values
primary is unquie.

foreign key allows null values it refers primary key.

foreign key allows duplicate values.

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Give syntax for SQL and ORACLE joins.

1092

What is different types of joins?

1018

How to use "startup" command to start default instance?

1027

Explain rename?

976

What is flashback in Oracle?

1015

How do I decide when to use right joins/left joins or inner joins or how to determine which table is on which side?

1018

What is Data Dictionary Cache in Oracle?

1163

please explain.. DB architecture ...

2018

Compare and contrast between sql and sql server and explain its various functions?

957

Is oracle the best database?

963

How many types of database triggers exist?

1126

How can Oracle users be audited?

1106

How to check the server version in oracle?

1092

From the following identify the non schema object: packages, triggers, public synonyms, tables and indexes.

1068

When system tablespace is created?

1036