Unique Index on a single column vs Adding a Unique Constraint?

Asked Nov 26 '13 at 09:30

Active Nov 26 '13 at 09:51

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What is the key difference between Unique Index on a single column and Adding a Unique Constraint ?

I found this link, which gives explanation about this on SQL_Server.

I tried to look through mySQL documentation, but could not understand it clearly.

edited Nov 26 '13 at 09:51

asked Nov 26 '13 at 09:30

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[Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?](http://stackoverflow.com/questions/707874/differences-between-index-primary-unique-fulltext-in-mysql) – Aziz Shaikh Nov 26 '13 at 09:32
I believe it's same thing – Uriil Nov 26 '13 at 09:36

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