SQL Queries for Mere Mortals Pearson uCertify Course Access Code Card, Fourth Edition: A Hands-On Guide to Data Manipulation in SQL

by John L Viescas

Each relation is composed of tuples (records or rows) and attributes (fields or columns).

When the subject is an object, the table represents something that is tangible,

When the subject of a table is an event, the table represents something that occurs at a given point in time and has characteristics you wish to record.