CREATE TABLE table_204_851 (id NUMBER, "serial number" NUMBER, "river" CLOB, "name" CLOB, "area  ( km2 ) " NUMBER, "district" CLOB, "co-ordinate" CLOB, "altitude  ( m ) " NUMBER)

name a reservoir that has an altitude of more than 100 but less than 500 .
SELECT "name" FROM table_204_851 WHERE "altitude (m)" > 100 AND "altitude (m)" < 500
SELECT "name" FROM "table_204_851" WHERE "altitude (m)" < 500 AND "altitude (m)" > 100