Sql Queries For Mere Mortals -

Sometimes you don't need raw data; you need the "big picture." Use to crunch numbers:

The standard. It only shows rows where there is a match in both tables (e.g., Orders that have a valid Customer). SQL Queries for Mere Mortals

Most data lives in separate tables. To get a complete picture, you must link them using . Sometimes you don't need raw data; you need the "big picture

Use these to total up sales or count your users. Sometimes you don't need raw data