Table: scooby_episodes
Columns: episode_title
villain_s
identity_ies
reason_s
original_airdate
dvd_volume

Question: What identities have more than 5 DVD volumes?
SQL: SELECT "identity_ies" FROM scooby_episodes WHERE "dvd_volume" > 5

Question: How many DVD volumes was identified by Skippy Johnson?
SQL: SELECT "dvd_volume" FROM scooby_episodes WHERE "identity_ies" = 'skippy johnson'