Now that you're familiar with the interface, let's get straight into it.
SQL, which stands for Structured Query Language, is a language for interacting with data stored in something called a relational database.
You can think of a relational database as a collection of tables. A table is just a set of rows and columns, like a spreadsheet, which represents exactly one type of entity. For example, a table might represent employees in a company or purchases made, but not both.
Each row, or record, of a table contains information about a single entity. For example, in a table representing employees, each row represents a single person. Each column, or field, of a table contains a single attribute for all rows in the table. For example, in a table representing employees, we might have a column containing first and last names for all employees.
The table of employees might look something like this:
How many fields does the employees table above contain?