When writing SQL queries it's important to keep a few things in mind. You want to organize your statement so that it's readable and easily understood by those that might follow. You also want to keep in mind the performance characteristics of the query.

SQL-Code:

SELECT * FROM Customers

There are a few things we might want to do with this statement. For starters, maybe we don't need all information from the Customers table at this time. Perhaps for our purposes we only need the Customer's first name and last name.