What are composite primary keys?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

The field (column) in a database table that is indexed and maintains the main sequence of the table. For example, account numbers are typically primary keys. A "composite primary key" is made up of two or more fields (columns) such as region + account number.

Source: Answers.com
5 people found this useful

What is the difference between a composition notebook and a primary composition notebook?

Composition Notebooks are the regular notebooks having Black marble cover with wide margin ruling, 100 pages or so. These are usually used in higher grades maybe 4th grade upw

What is the difference between primary key and composite key?

primary key . is a single field or combination of fields that uniquely defines a record. None of the fields that are part of the primary key can contain a null value. A table

Difference between composite and primary key?

There are two types of keys in any database; composite and primarykeys. Composite key differs from primary key in that it containsmore than one column while primary key is com

Explain about primary key super key candidate key alternate key composite key foreign key?

KEYS IN SQL * Alternate key - An alternate key is any candidate key which is not selected to be the primary key * Candidate key - A candidate

Candidate key and primary key differnece?

All Primary keys are definitely Candidate Keys. A Candidate key is one which can be used as a Primary key that is not null and unique. That is one of the candidate keys can be

Example of primary key and foreign key?

primary key means unique as well as non-nullable field for a table it supposed don't have duplicate value. . foreign key means is referential field in a table meanwhile is pr

Why it is important to use a primary key?

Whenever accessing or editing data it is important that you canensure the correct data is being accessed. Primary keys allow youto select, update or delete a specific row with