On 18/02/2013, at 7:58 AM, Tim Uckun <timuckun@gmail.com> wrote:
>> Apparently the first 6 characters of those fields are quite common, =
which
>> gives you a result for every possible combination of the same =
6-character
>> value.
>=20
>=20
> Mmmmm. That seems kind of weird. Is there any way to NOT have this
> be a cross join? For example if I extracted the first six characters
> into a field and then joined on them it would not be a cross join
> right?
In some way, every join is a cross join, with the results filtered =
according to the specificity of the join conditions. In this case:
inner join model_configurations mc on left(crm.customer_class, 6) =3D =
left(mc.sap_code,6)
"customer_class" sounds like a fairly generic sort of field, so you'd =
expect many matches. Truncating the fields is likely to make this even =
less specific, returning more results.
Cheers,
Tony
=20=
