CREATE TABLE table_1990 ("Stage  ( Winner ) " CLOB, "General Classification" CLOB, "Points Classification" CLOB, "Mountains Classification" CLOB, "Young Rider Classification" CLOB, "Team Classification" CLOB)

Name the mountains classification for team columbia
SELECT "Mountains Classification" FROM table_1990 WHERE "Team Classification" = 'Team Columbia'
SELECT "Mountains Classification" FROM "table_1990" WHERE "Team Classification" = 'Team Columbia'