Understanding how SQL databases work

A database can be made up of many tables, and a table in a database is made up of intersecting columns and rows that form a grid. A good way to think about this is to imagine a checker board. Along the top row of the checkerboard there are labels for the data you wish to store, for example Name, Age, Gender, Eye Color, etc. In all the rows below, information is stored. Each row is one entry (all the data in a single row, belongs to the same person in this case) and each column contains a specific type of data as indicated by its label. Here is something to help you visualize a table: