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Chapter 10a review questions
Consider the entity type dependent related to employee entity, which is used to keep track of the dependents of every employee. The attributes of dependents are: name, sex, birth d
Describe the Composite Key Composite Key: Sometimes one key is not enough to uniquely recognize a row. E.g. in a single class Roll is enough to search a student, but in the w
what is binary relationship
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
wh
What is association? Give an example of association Association is used for establishing relationships among classes. Association describe links among/between classes. For exa
DDL Compiler The DDL compiler changes the data definition statements (such as CREATE TABLE .... in SQL) into a set of tables having metadata tables. These tables have infor
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
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