You have been provided with the following, incomplete, ERD for a database to record students’ results in units. List and explain what would need to be added to this ERD to enable a record of students’ results in units. You should assume that a student can take a unit several times, for example, if they fail, they can take the unit again until they record a passing grade. You can also assume that each unit is only offered once each year.

Q: it possible for a database to have two similar data without compromising its integrity? Why do you…

A: it possible for a database to have two similar data without compromising its integrity

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.