I have a table with images in SQL database. It looks something like this.
SELECT * FROM eshop_images WHERE fg_idProduct='$id' AND main='1'
+----------+-----+------+--------------+
| idImages | url | main | fg_idProduct |
+----------+-----+------+--------------+
| 1 | x | 0 | 1 |
| 2 | x | 1 | 1 |
| 3 | x | 0 | 1 |
| 4 | x | 0 | 2 |
| 5 | x | 0 | 2 |
| 6 | x | 0 | 2 |
| 7 | x | 1 | 2 |
+----------+-----+------+--------------+
Each product can only have one main image, but what if I want to set some other image which is 0 as main one?
I have to go through the whole table where fg_idProduct=$id and SET them to null. I don't know how to do this, can somebody help me?
Thanks.