B 固定比C小么？如果不固定，两种情况都要判断，用union all代替or
SELECT D FROM A WHERE D < B AND Bunion allSELECT D FROM A WHERE D > C AND Bunion allSELECT D FROM A WHERE D > B AND B>Cunion allSELECT D FROM A WHERE D < C AND B>C
not between
