Question

trying to rename duplicates in MySQL database so far using that code but this only adding 1 at the end of name. So if I have

    UPDATE phpfox_photo n 
  JOIN (SELECT title_url, MIN(photo_id) min_id FROM phpfox_photo GROUP BY title_url HAVING COUNT(*) > 1) d
    ON n.title_url = d.title_url AND n.photo_id <> d.min_id
SET n.title_url = CONCAT(n.title_url, '1'); 


Anna
Anna
Anna

Result is

Anna
Anna1
Anna11

When I got 200 Annas result is Anna1111111111111111111111111111111111111111111….etc

how do I do it to rename in the following inc

Anna
Anna1
Anna2

Answer 1

if i didn’t miss something you can make a stored procedure that iterates throw your rows using cursors to do that as following:

DECLARE counter INT DEFAULT 0;
DECLARE num_rows INT DEFAULT 0;
DECLARE offset INT;
DECLARE title_urlvalue VARCHAR(50);
DECLARE no_more_rows BOOLEAN;
DECLARE ucur CURSOR FOR
  SELECT
    UPDATE phpfox_photo n 
    JOIN (SELECT title_url, MIN(photo_id) min_id 
    FROM phpfox_photo GROUP BY title_url HAVING COUNT(*) > 1) d
    ON n.title_url = d.title_url AND n.photo_id <> d.min_id;
SET offset = 1;
SET no_more_rows = TRUE;
select FOUND_ROWS() into num_rows;
OPEN ucur;
uloop: LOOP
  FETCH  ucur
  if counter >= num_rows then
    no_more_rows = False;
  endif
  INTO   title_urlvalue;
  IF no_more_rows THEN
    CLOSE ucur;
    LEAVE uloop;
   END IF;
   update title_urlvalue = Concat(title_urlvalue,offset);
  SET offset = offset + 1;
  SET counter = counter + 1;
END LOOP uloop;
close ucur;