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Databasetransaktion.
En databasetransaktion er en række operationer, der betragtes som en samlet logisk enhed eller atomisk (udelelig).
Det skal forstås sådan at enten skal databasen udføre og gemme resultatet af alle operationerne i transaktionen eller også skal intet blive ændret i databasen. Der må ikke kun blive udført halvdelen af operationerne.
Et eksempel på en atomisk operation er en ordre (invoice). I ordrens indlæggelsesproces gøres følgende:
- ilæggelse af varebestillinger.
- varebeholdning tælles ned.
- beregning af faktura/regning-beløb til bogføring på ordretidspunktet.
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