CREATE TABLE table_204_850 (id NUMBER, "name" CLOB, "railway" CLOB, "series" CLOB, "maker" CLOB, "dates" CLOB, "drive" CLOB, "wheel arrangement" CLOB, "weight" CLOB, "power" CLOB, "notes" CLOB)

what is the combined weight of the big boy and the m1 ?
SELECT SUM("weight") FROM table_204_850 WHERE "name" IN ('big boy', 'm1')
SELECT SUM("weight") FROM "table_204_850" WHERE "name" IN ('big boy', 'm1')