-- How many total sectors are there?
SELECT COUNT(*) AS total_sectors FROM sectors;
SELECT * FROM sectors;
-- List all sectors where sector_id are 1, 2 and 3.
SELECT * FROM sectors WHERE id_sector IN (1,2,3)
-- List all sectors where sector_id are NOT 1, 2 and 3.
SELECT * FROM sectors WHERE id_sector NOT IN (1,2,3)