Introduction to Database System
In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

Composite Relationship
One-to-Many Relationship
Many-to-Many Relationship
One-to-One Relationship

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Introduction to Database System
With respect to data input, the most accurate description of batch control is

None of these
dividing documents to be entered into batches
controlling the input of each input clerk
All of these
comparing to a pre-calculated figure the total of a data item summed across a batch records put into the system

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