CREATE TABLE table_203_591 (id DECIMAL, "high school" TEXT, "join\ year" TEXT, "from" TEXT, "left" TEXT, "league left to" TEXT)

what is the difference between the year clio left and atherton left ?
SELECT ABS((SELECT "left" FROM table_203_591 WHERE "high school" = 'clio') - (SELECT "left" FROM table_203_591 WHERE "high school" = 'atherton'))
SELECT ABS((SELECT "left" FROM "table_203_591" WHERE "high school" = 'clio') - (SELECT "left" FROM "table_203_591" WHERE "high school" = 'atherton'))