This feature isn't available in current versions of mySQL, but is on the
TODO list.
regards,
P
On Fri, 23 Feb 2001, Sam Joseph wrote:
> Hi there,
>
> Doesn't seem to be a FAQ so here goes with a question
>
> My MySQL manual has the following to say about how to count the number
> of distinct values in a particular column
>
> COUNT(DISTINCT expr,[expr...])
> Returns a count of the number of different values.
> mysql> select COUNT(DISTINCT results) from student;
>
> however on the MySQL versions I currently have access to (3.22.32 &
> 3.22.34) I get this:
>
> mysql> select COUNT(DISTINCT SOME_COLUMN) from SOME_TABLE;
> ERROR 1064: You have an error in your SQL syntax near 'DISTINCT
> SOME_COLUMN) from SOME_TABLE' at line 1
>
> whereas
>
> mysql> select COUNT(SOME_COLUMN) from SOME_TABLE;
>
> works fine
>
> I am assuming that either this function is not available or that it is a
>
> bug that has been fixed in a later release (or is on a todo list
> somewhere).
>
> Can anybody fill me in?
>
> Thanks in advance
>
> CHEERS> SAM
>
>
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