what do you mean by atomicity and aggregation, Database Management System

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what do you mean by atomicity and aggregation

What do you mean by atomicity and aggregation?

Atomicity: Either all actions are carried out or none are. Users should not have to worry about the effect of incomplete transactions. DBMS ensures this by undoing the actions of incomplete transactions.

Aggregation: A concept which is used to model a relationship among a collection of entities and relationships. It is used when we require to express a relationship between relationships.

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