How to use concat() to append to multiple columns in a single mysql update
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I can't figure out the syntax for Mysql update with multiple concatinations. I want to be able to append a string to the end of the string string stored in the database but do it to multiple columns all at once. I can do one column at a time just fine with this  

UPDATE `table1`.`column1` SET `category1` = CONCAT(category1,'$value[0]',) WHERE `id`='$id';  
  
but when I try to do it to multiple columns in the same table I get a syntax error.  
  
UPDATE `table1`.`column1` SET `category1` = CONCAT(category1,'5'), `category2` = CONCAT(category2,'5'), `category3` = CONCAT(category3,'5'), `category4` = CONCAT(category4,'5'), `category5` = CONCAT(category5,'5'), `comments` = CONCAT(comments, 'jfsaklfsad') WHERE `for_student_id`='46'; 
  
"You have an error in your SQL syntax;"  
  
I cant find the syntax for separating each concat.
  