Tony,
The problem is not with the OR or the DISTINCT ON.
You are requesting a cartesian product ot three tables.
You should have a JOIN ON or a proper WHERE clause.
JLL
tony wrote:
>
> Hello,
>
> I've been having some problems with this SELECT clause.
>
> SELECT DISTINCT ON (nom, prenom) nom, prenom, sexe, titre, type,
> structure.adresse, structure.boitepostal, structure.codepostal,
> structure.ville
> FROM individu, structure, fonction
> WHERE type = 'CT' OR type = 'CA'
>
> The DISTINCT ON bit puts the query into a flat tailspin. Why?
>
> Cheers
>
> Tony Grant
>
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