A.where ename like ‘_HOT%’ B.where ename like ‘H_T%’ C.where ename like ‘%TKA_’ D.where ename like ‘%TOK%’
A.12+NULL B.60*NULL C.NULL‖’NULL’ D.12/(60+NULL)
A.NEXT_DAY(ADD_MONTHS(’28-5月-06’,5)) B.NEXT_DAY(MONTHS_BETWEEN(’28-5月-06’,5)) C.LAST_DAY(MONTHS_BETWEEN(’28-5月-06’,5)) D.LAST_DAY(ADD_MONTHS(’28-5月-06’,5))