CREATE TABLE table_204_312 (id NUMBER, "stage" CLOB, "date" CLOB, "route" CLOB, "terrain" CLOB, "length" CLOB, "winner" CLOB)

how many number of stages in the tour de france contain stages with mountains ?
SELECT COUNT("stage") FROM table_204_312 WHERE "terrain" = 'stage with mountain(s)'
SELECT COUNT("stage") FROM "table_204_312" WHERE "terrain" = 'stage with mountain(s)'