Unique key - Wikipedia, the free encyclopedia
In relational database design, a unique key or primary key is a candidate key to uniquely identify each row in a table. A unique key or primary key comprises a single column or set of columns. No ...
en.wikipedia.org/wiki/Unique_key
Ah … primary keys … such a topic!  When discussing what columns to define as a primary key in your data models, two large points always tend to surface:
weblogs.sqlteam.com/jeffs/archive/2007/08/23/composite_... weblogs.sqlteam.com/jeffs/archive/2007/08/23/composite_primary_keys.aspx
A primary key is the field or fields in a table that uniquely identifies the record. An everyday example of a primary key is a person's social security number in the United States.
www.campbell.k12.ky.us/database/addressbook/pages/prima... www.campbell.k12.ky.us/database/addressbook/pages/primarykey.htm
Foreign key - Wikipedia, the free encyclopedia
In the context of relational databases, a foreign key is a referential constraint between two tables. The foreign key identifies a column or a set of columns in one (referencing) table that refers t...
en.wikipedia.org/wiki/Foreign_key
Introduces the concept of primary key. A primary key is used to uniquely identify each row in the table. ... A primary key is used to uniquely identify each row in a table. It can either be part of the actual record itself , or it can be an artificial field (one that has nothing to do with the actual record). A primary key...
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The home page for The Primary Key Bookstore showing specials and featured items. ... The Primary Key Bookstor ... ; Thank you from ;
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This page describes the term primary key and lists other pages on the Web where you can find additional information. ... For internet.com pages about primary key . Also check out the following links!
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Name of the table adding the primary key to ... Name of the column the primary key is created on ... The ALTER TABLE PRIMARY KEY command modifies the definition of an existing table and adds a primary key. Only the table owner, a DBA, or a user with both the ALTER and INDEX privileges for the table may execute the command.
www.dbmaker.com/reference/manuals/sql/SQLALTER_TABLE_PR... www.dbmaker.com/reference/manuals/sql/SQLALTER_TABLE_PRIMARY_KEY.htm
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