sql-workshop-notes/lab.md

Lab - MySQL

Goal

Find out how many flights go from NYC to Paris

Stretch Goals

• Do this so that just the number appears as the result of only one SQL statement
• Which airlines travel from NYC to Paris?
• Find all the flights that leave NYC. Give me a list of how many go to each destination city.

Hints

• The routes table has a column called origin_id and another called destination_id. These map to the id column in the airport table.

• You're going to have to use the airports table twice in the same SQL statement. In order to tell which airport is the destination and which is the origin, you're going to have to temporarily rename the airports table like so:

  	/* note that once you rename a table, you MUST refer to it by its new name */
  	SELECT * FROM airports AS origin WHERE origin.city = 'New York';
  	/* later on in the SQL statement, when dealing with the destination, you should do the same for airports AS destination */