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How to limit LEFT JOIN to one record only?
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Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Versions des environnements
Visual FoxPro:
VFP 9 SP1
Divers
Thread ID:
01534771
Message ID:
01534773
Vues:
77
>Hi,
>
>I am trying to limit LEFT JOIN to select only one record. By design the child table should have only one record but I ran into a case where user had two records (wrong but it happens). And when two records are selected the entire resulting query is wrong. So, for example, say I have the following query:
>
>
>select .... from Table1 left join Table2 on Table1.pk_field = Table2.pk_field
>
>
>How can I change (if possible) the ON expression so that if Table2 has more than one record that matches the Table1.pk_field, only one is selected? (It does not matter to me which one). TIA.

SELECT TOP 1 ... ORDER BY Table1.pk_field
--sb--
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