Exam 2: The Relational : Introduction, QBE, and Relational Algebra

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A(n)____________________ database is a collection of tables.​

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The relationships between tables are handled through ____________________ columns.​

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A column whose value uniquely identifies a given row in the table is the secondary key.​

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A relation is a(n)____.​

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​The comparison operators are also known as relational operators.

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When a structure satisfies all the properties of a relation except for the first item-in other words,some entries contain repeating groups and thus are not single-valued-it is referred to as a(n)____________________.​

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The compound criteria (conditions)are created by using ____.​

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Based on the Customer table below,which command lists all information from the table concerning customer 260?​ CustomerNum CustomerName Street City State PostalCode 126 Toys Galore 28 Laketon St. Fulton CA 90085 260 Brookings Direct 452 Columbus Dr. Grove CA 90092

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In a relation,the order of rows is important.​

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​Conditions that data must satisfy are called ____________________.

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