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What does the cardinality ratio specify?
Mapping cardinalities or cardinality ratios state the number of entities to which another entity can be associated. Mapping cardinalities must be one of the following:
One to one
One to many
Many to one
Many to many
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
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explain in details about one to one binary relationship
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what is un ordered and ordered file managment?
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