sql: syntax error sql query : How to fix this issue:
SQL Error:
-------

`Unknown column 'exdays_relation.exercise_id' in 'on clause'`

SQL query:
---------
SELECT * FROM `user_days` LEFT JOIN `menu` ON `menu`.`id` = `exdays_relation`.`exercise_id` JOIN `exdays_relation` ON `exdays_relation`.`day_id` = `user_days`.`day_id` WHERE `user_days`.`for_date` LIKE '2016-12-12'

***query relation:***

    menu
    -------
    id 	int(11)	PK	AUTO_INCREMENT 
    
    exdays_relation
    -------------------
    exdaysrel_id	   int(11)	PK	AUTO_INCREMENT
    exercise_id	       int(11)	FK  from id(menu)	
    day_id 			   int(11)  FK  from day_id(user_days)
    
    
    user_days
    -----------------
    day_id  	int(11)		PK 
    for_date	date


