On Wed, Oct 29, 2014 at 7:25 AM, Laurie Alvey <[email protected]> wrote:

> The only way I've found to do this is to use an external function, like
> this:
>
> CLOSE DATABASES ALL
> *!* Source tables have 100 rows of random integers
> USE colmin1.dbf
> USE colmin2.dbf IN 0
> USE colmin3.dbf IN 0
> USE colmin4.dbf IN 0
>
> CREATE CURSOR cout (f1 I, f2 I, f3 I, f4 I, minv I)
>
> INSERT INTO cout ;
> SELECT c1.f1, c2.f2, c3.f3, c4.f4, ;
> MinCol(c1.f1, c2.f2, c3.f3, c4.f4) As minv FROM colmin1 c1 ;
> JOIN colmin2 c2 ON c1.pk = c2.pk ;
> JOIN colmin3 c3 ON c1.pk = c3.pk ;
> JOIN colmin4 c4 ON c1.pk = c4.pk
>
> FUNCTION MinCol(n1, n2, n3, n4) As Integer
> RETURN CAST(MIN(n1,n2,n3,n4) As I)
> ENDFUNC
>
> I'd be interested to see another way of doing this.
> ------------------


Why not Union the Min Query for as many tables as necessary into
independent rows in a temp table / cursor and then min that single column ?



-- 
Stephen Russell
Sr. Analyst
Ring Container Technology
Oakland TN

901.246-0159 cell


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