CREATE TABLE table_204_148 (id DECIMAL, "name" TEXT, "elected" TEXT, "term began" TEXT, "term ended" TEXT)

who was the first mayor in the 1900 's ?
SELECT "name" FROM table_204_148 WHERE "term began" > 1900 ORDER BY "term began" LIMIT 1
SELECT "name" FROM "table_204_148" WHERE "term began" > 1900 ORDER BY "term began" NULLS FIRST LIMIT 1