CREATE TABLE table_28818 ("Hydrographic Basin" CLOB, "Surface Area  ( km 2  ) " FLOAT, "Rainfall totals  ( million m 3  ) " FLOAT, "Evapotranspiration  ( million m 3  ) " FLOAT, "Surface water runoff  ( million m 3  ) " FLOAT, "Groundwater discharge  ( million m 3  ) " FLOAT)

What is the lowest overall amount of rainfall totals (million m 3)?
SELECT MIN("Rainfall totals (million m 3 )") FROM table_28818
SELECT MIN("Rainfall totals (million m 3 )") FROM "table_28818"