php_mysql_apache [Electronic resources]

Julie C. Meloni

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Q&A

Q1:

Are there only three normal forms?

A1:

No, there are more than three normal forms. Additional forms are the Boyce-Codd normal form, fourth normal form, and fifth normal form/Join-Projection normal form. These forms are not often followed because the benefits of doing so are outweighed by the cost in man-hours and database efficiency.