What is the data type of the surrogate key?

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Suma

  • Sep 20th, 2007
 

Always number

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sindu

  • Nov 2nd, 2007
 

Numuric, because it generates Numuric values.

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VAMSIKRISHNACH

  • Dec 6th, 2007
 

1.It is always integer.
2.This is because we are generating a key and best performance comes only when keys are numeric. so they generate keys numerically only so that sorting is also quiet cheap for numbers  compared to char,varchar.. 

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tirukosri

  • Jun 4th, 2008
 

Surrogate keys are the system generated keys and used to eliminate the redundancy in the primary keys. So they are always integer numbers.

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Aswin

  • Feb 4th, 2014
 

Why cant we use a GUID? which is more powerful and have good uniqueness

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Liam Whales

  • Mar 24th, 2014
 

Anything that can always be uniquely generated and bears no relation on the underlying data

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