使用mysql从列中删除特定ID

Question

Two tables named are image and product the structure of the tables are as below

Table : Image

image_id    image_path  image
  1          ./images/   aaa
  2          ./images/   bbb
  3          ./images/   ccc

Table : Product

product_id   product_gallery
  1           1,2
  2           3,1
  3           1,2,3

Now I want to remove the image from image table image_id = 3

While I'm deleting image id 3 from image table, at the same time product table product gallery column containing the id 3 will be deleted.

For example

Expected output :

   product_id   product_gallery
      1           1,2
      2           1
      3           1,2

I don't have any idea for this but I can delete the images as of now, still I want to delete image id from the product table.

Answer 1

It's better to have a 3-rd table , some thing like :

Table : product-gallery

   product_id   image_id
      1           1
      1           2
      2           1
      3           1
      3           2

In this way, working with database would be as easy as abc :)

But if you want to go your way, you have to deal with some sql or php processing functions.

Answer 2

i think it is better if you change the way your product table was constructed.. it would give you a hard time retrieving and manipulating it.. try using this format:

id product_id product_gallery
1    1          1
2    1          2
3    2          1

etc etc...