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ACID properties of databases
Description of the properties
ACID stands for
Modification on the data in the database either fail or succeed. The beginning of such a modification starts with a transaction and ends when a transaction finishes (either by a commit or a rollback). A software crash entails an implicit rollback.
Only valid data (valid according to integrity constraints) may be commited.
One transaction does not interfere with another. The 'executor' of a transaction has the feeling that he has the entire database for himeself.
A commited transaction will not be lost.