Tables are the structures that store related data. Data is organized into columns and rows. At the intersection of each column and row is a field (or cell). Each field contains one piece of data.
The column identifies the type of data in the fields within it (for example, user ID). A row identifies all the data related to a particular record that is stored in the table.
Every table in a database has a column for the primary key. The primary key uniquely identifies each record in the table. For instance:
