CREATE TABLE events (event_id NUMBER, service_id NUMBER, event_details CLOB)
CREATE TABLE participants_in_events (event_id NUMBER, participant_id NUMBER)
CREATE TABLE services (service_id NUMBER, service_type_code CLOB)
CREATE TABLE participants (participant_id NUMBER, participant_type_code CLOB, participant_details CLOB)

How many participants belong to the type 'Organizer'?
SELECT COUNT(*) FROM participants WHERE participant_type_code = 'Organizer'
SELECT COUNT(*) FROM "participants" WHERE "participant_type_code" = 'Organizer'