65.3 Columns and Data Types
It is helpful at this stage to begin to view a database table as being similar to a spreadsheet where data is stored in rows and columns.
Each column represents a data field in the corresponding table. For example, the name, address and telephone data fields of a table are all columns.
Each column, in turn, is defined to contain a certain type of data. A column designed to store numbers would, therefore, be defined as containing numerical data.