This list will be frequently updated as the course progresses. An item can be read and not written in a transaction. If hours exceed a certain limit, the employee overtime field is set.
Transaction updates overtime status.
We have done the characteristics of two operations which is in conflict. But I'm not sure what does it mean to be in conflict. Conflict means the potential to introduce data inconsistency, such as the problems caused by lost update, dirty read etc. No, it represents a generic architecture, identifying the essential modules. Commercial DBMS products may have variations and extensions.