Jasper Bryant-Greene wrote:
Michael Stassen wrote:
Not exactly. They aren't the same. COUNT(id) counts distinct values
of id, while COUNT(*) simply counts rows. [snip]
Actually, COUNT(id) counts non-NULL values of id. COUNT(DISTINCT id)
would count distinct values.
http://dev.mysql.com/doc/mysql/en/group-by-functions.html#id2873509
Jasper
Don't know where my brain was, but you are exactly right. Sorry for my mistake.
Michael
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