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Re: [PROGRAMMERING] [SQL] Betinget INSERT?



2009/3/25 Jacob Sparre Andersen <sslug@sslug>:

> Har SQL en kompakt og effektiv formulering af at man gerne vil
> indsætte en række i en tabel, hvis der ikke allerede findes en række
> med samme nøgle?

Hvis du aldrig vil accepterer to rækker med samme nøgle, så bør du
lave et unique
index på nøglen.

Mvh
Martin


 
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