A rental car agency classifies the vehicles it rents into four categories: compact, mid-size, full-size and sport utility. The agency wants to record the following data for all vehicles: Vehicle, Make, Model, Year and Color. There are no unique attributes for any of the four classes of vehicles. The entity type vehicle has a relationship named Rents with customer entity type. None of the four vehicle classes has a unique relationship with any entity type. Would you consider creating a supertype/subtype relationship for this problem? Why or why
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
A rental car agency classifies the vehicles it rents into four categories: compact, mid-size, full-size and sport utility. The agency wants to record the following data for all vehicles: Vehicle, Make, Model, Year and Color. There are no unique attributes for any of the four classes of vehicles. The entity type vehicle has a relationship named Rents with customer entity type. None of the four vehicle classes has a unique relationship with any entity type.
Would you consider creating a supertype/subtype relationship for this problem? Why or why not?
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