Unique Key

Primary Key vs Unique Key

Primary Key vs Unique Key
A primary key cannot allow null and can only be created once in a table. A unique key allows null and can be created multiple times in a table. The keys play an important part when it comes to storing and...

Most Searched in Food and Drink Most Searched in Pregnancy and Parenting
Most Searched in Education and References Most Searched in Society and Culture
Miss vs Ms.
Teak Wood vs Rubber Wood
iPad Mini vs Nexus 7
Coffee Beans vs Cocoa Beans