Tuesday 8 July 2014

Primary Key:

Primary Key: 
It will not allow "Null values" and "Duplicate values"


Foreign Key:
It will allow "Null values" and "Duplicte values" and it refers to a primary key in anoter table - See more at: http://talk.thewebhostingdir.com/microsoft-sql-server/22715-difference-between-primary-key-foreign-key.html#sthash.pt6CMqyW.dpuf
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