CREATE TABLE table_204_296 (id NUMBER, "rank" NUMBER, "athlete" CLOB, "qual" NUMBER, "final" NUMBER, "total" NUMBER, "notes" CLOB)

what is the difference in qualifying for sharon bowes and silvia sperber ?
SELECT ABS((SELECT "qual" FROM table_204_296 WHERE "athlete" = 'sharon bowes') - (SELECT "qual" FROM table_204_296 WHERE "athlete" = 'silvia sperber'))
SELECT ABS((SELECT "qual" FROM "table_204_296" WHERE "athlete" = 'sharon bowes') - (SELECT "qual" FROM "table_204_296" WHERE "athlete" = 'silvia sperber'))