Table: tv_episode_7
Columns: no_in_series
title
directed_by
written_by
original_air_date
production_code

Question: Name the total number of production code by david richardson and todd holland
SQL: SELECT COUNT("production_code") FROM tv_episode_7 WHERE "written_by" = 'David Richardson' AND "directed_by" = 'Todd Holland'

Question: Name the total number of series for march 19, 2000
SQL: SELECT COUNT("no_in_series") FROM tv_episode_7 WHERE "original_air_date" = 'March 19, 2000'