ออตตาวามีกี่ครัวเรือน?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many households are in Ottawa?It is not neccessary to use all the tables.
 table_name_58:  (number_of_households [ INTEGER ] county [ VARCHAR) ]
SELECT SUM(number_of_households) FROM table_name_58 WHERE county = "ottawa"