It is sometime suggested that types are really variables too, like relvar, for example, legal employee number might grow from three digits to four as a business expands, so we might need to update “the set of all possible employee number”, Discuss,
Answer to relevant QuestionsSQL has no formal row array literals. Explain and justify this observation. Write an expression that returns true if the current value of the parts relvar P is empty and false otherwise. Do not use the is-empty shorthand. Consider the SQL type point and the SQL table points as defined in the subsection “Structured Types” Type Point has a representation involving Cartesian coordinates X and Y. What happens if we replace that type by a ...Given that intersect is a special case of join, why do not both operators give the same result when applied to no relation at all?Get the total number of projects supplied by supplier S1.
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