Exercise

Future gold medalists

Fetching functions allow you to get values from different parts of the table into one row. If you have time-ordered data, you can "peek into the future" with the LEAD fetching function. This is especially useful if you want to compare a current value to a future value.

Instructions

100 XP

For each year, fetch the current gold medalist and the gold medalist 3 competitions ahead of the current row.