mysql sorting and ranking statement

Question

I need some help in mysql statement Ive table1 with 7 column and table 2 with 8 column the extra column named ranking , my statement should be like select all from table 1

Answer 1

INSERT INTO table2
  SELECT @rank := @rank + 1, table1.* FROM table1
  JOIN( SELECT @rank := 0 ) AS init
  ORDER BY number_of_users DESC