Defining Stored Programs

ok

 DROP PROCEDURE
 IF EXISTS truncate_insert_rank_month;
 DELIMITER /w/

 CREATE PROCEDURE truncate_insert_rank_month ()
 BEGIN

 SET @w = 10 ; TRUNCATE rank_month ;
 WHILE @w < 110 DO
     INSERT INTO rank_month (
         fk_country,
         fk_categoryid,
         topx,
         history_year,
         history_month,
         coin_sum,
         amount_sum
     ) SELECT
         country,
         categoryid,
         @w,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M'),
         SUM(grab_coin),
         SUM(grab_amount)
     FROM
         grab_rank
     WHERE
         grab_amount_rank < (@w + 1)
     GROUP BY
         country,
         categoryid,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M') ;
     SET @w = @w + 10 ;
     END
     WHILE ;
     END/w/
 DELIMITER;
 CALL truncate_insert_rank_month;

ok

 DROP PROCEDURE
 IF EXISTS truncate_insert_rank_month;
 DELIMITER /w/

 CREATE PROCEDURE truncate_insert_rank_month ()
 BEGIN
     TRUNCATE rank_month ;
 SET @w = 10 ;
 WHILE @w < 110 DO
     INSERT INTO rank_month (
         fk_country,
         fk_categoryid,
         topx,
         history_year,
         history_month,
         coin_sum,
         amount_sum
     ) SELECT
         country,
         categoryid,
         @w,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M'),
         SUM(grab_coin),
         SUM(grab_amount)
     FROM
         grab_rank
     WHERE
         grab_amount_rank < (@w + 1)
     GROUP BY
         country,
         categoryid,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M') ;
     SET @w = @w + 10 ;
     END
     WHILE ;
     END/w/
 DELIMITER;
 CALL truncate_insert_rank_month;

 DROP PROCEDURE
 IF EXISTS truncate_insert_rank_month;
 DELIMITER /w/

 CREATE PROCEDURE truncate_insert_rank_month ()
 BEGIN
     TRUNCATE rank_month ;
 DECLARE w INT ;
 SET w = 10 ;
 WHILE w < 110 DO
     INSERT INTO rank_month (
         fk_country,
         fk_categoryid,
         topx,
         history_year,
         history_month,
         coin_sum,
         amount_sum
     ) SELECT
         country,
         categoryid,
         w,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M'),
         SUM(grab_coin),
         SUM(grab_amount)
     FROM
         grab_rank
     WHERE
         grab_amount_rank < (w + 1)
     GROUP BY
         country,
         categoryid,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M') ;
     SET w = w + 10 ;
     END
     WHILE ;
     END/w/
 DELIMITER;
 CALL truncate_insert_rank_month;

[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DECLARE w INT ;
SET w = 10 ;
WHILE w < 110 DO
    INSERT INTO rank_month (
        fk' at line 4

http://dev.mysql.com/doc/refman/5.7/en/stored-programs-defining.html

 DROP PROCEDURE
 IF EXISTS truncate_insert_rank_month;
 DELIMITER /w/

 CREATE PROCEDURE truncate_insert_rank_month ()
 BEGIN

 DECLARE w INT ; TRUNCATE rank_month ;
 SET w = 10 ;
 WHILE w < 110 DO
     INSERT INTO rank_month (
         fk_country,
         fk_categoryid,
         topx,
         history_year,
         history_month,
         coin_sum,
         amount_sum
     ) SELECT
         country,
         categoryid,
         w,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M'),
         SUM(grab_coin),
         SUM(grab_amount)
     FROM
         grab_rank
     WHERE
         grab_amount_rank < (w + 1)
     GROUP BY
         country,
         categoryid,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%M') ;
     SET w = w + 10 ;
     END
     WHILE ;
     END/w/
 DELIMITER;
 CALL truncate_insert_rank_month;

 DROP PROCEDURE
 IF EXISTS truncate_insert_rank_week;
 DELIMITER /w/

 CREATE PROCEDURE truncate_insert_rank_week ()
 BEGIN

 DECLARE w INT ; TRUNCATE rank_week ;
 SET w = 10 ;
 WHILE w < 110 DO
     INSERT INTO rank_week (
         fk_country,
         fk_categoryid,
         topx,
         history_year,
         history_week,
         coin_sum,
         amount_sum
     ) SELECT
         country,
         categoryid,
         w,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%V'),
         SUM(grab_coin),
         SUM(grab_amount)
     FROM
         grab_rank
     WHERE
         grab_amount_rank < (w + 1)
     GROUP BY
         country,
         categoryid,
         DATE_FORMAT(grab_date, '%Y'),
         DATE_FORMAT(grab_date, '%V') ;
     SET w = w + 10 ;
     END
     WHILE ;
     END/w/
 DELIMITER;
 CALL truncate_insert_rank_week;

 DROP PROCEDURE
 IF EXISTS truncate_insert_rank_all;
 DELIMITER /w/

 CREATE PROCEDURE truncate_insert_rank_all ()
 BEGIN

 DECLARE w INT ; TRUNCATE rank_all ;
 SET w = 10 ;
 WHILE w < 110 DO
     INSERT INTO rank_all (
         fk_country,
         fk_categoryid,
         topx,
         coin_sum,
         amount_sum
     ) SELECT
         country,
         categoryid,
         w,
         SUM(grab_coin),
         SUM(grab_amount)
     FROM
         grab_rank
     WHERE
         grab_amount_rank < (w + 1)
     GROUP BY
         country,
         categoryid ;
     SET w = w + 10 ;
     END
     WHILE ;
     END/w/
 DELIMITER ;

 CALL truncate_insert_rank_all;