Top ten
We often want to know the top 1, 2, 10 or whatever values from a query. This is dead simple in MySQL. However many JOINs and WHEREs the query has, simply ORDER BY the column(s) whose highest values are sought, and LIMIT the resultset:
SELECT (somecolumn), (othercolumns) ...
FROM (some tables) ...
ORDER BY somecolumn DESC
LIMIT 10;