DAD 220 CHAPTER 2 RELATIONAL DATABASE QUESTIONS WITH CORRECT ANSWERS

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What is the mathematical term equivalent for "column"?


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Attribute (files: field)




Structural Rules

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Structural rules are relational rules that govern data in every relational
database. (such as a unique primary key, unique column name, and no
duplicate rows)




No duplicate rows


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No two rows of the same table may have identical values in all columns.




Operand


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One of the values on which an operator operates.




The relational data structure and operations are based on "_" theory.


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set




NULL "OR" TRUE

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TRUE




Unique primary key


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All tables should have a column with no repeated values, called the
primary key and used to identify individual rows.




A table must have at least "_" column and any number of rows.


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one




Union


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Combines two tables into a larger table.




Data type


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