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Recommended textbook solutions Engineering Electromagnetics8th EditionJohn Buck, William Hayt 483 solutions Introduction to the Theory of Computation3rd EditionMichael Sipser 389 solutions Introduction to Algorithms3rd EditionCharles E. Leiserson, Clifford Stein, Ronald L. Rivest, Thomas H. Cormen 720 solutions
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Which of the following does every table in a database need to have?All tables in a relational database should have a primary key. The primary key is a column, or set of columns, that allows each row in the table to be uniquely identified.
What is the name of the rule that states that either each foreign key value must match a primary key value in another relation or the foreign key value must be null?A rule that states that each foreign key value must match a primary key value in the other relation is called the: referential integrity constraint.
What do you mean by primary key?A primary key is the column or columns that contain values that uniquely identify each row in a table. A database table must have a primary key for Optim to insert, update, restore, or delete data from a database table.
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Is a consistent relational database state in which every foreign key value also exists as a primary key value?
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