I need to insert a new column of URLs into a table of items based on their ROM code that already exists in a column of my table.

my URL needs to have the following format
/media/marquees/{ROM}.png

```
|  rom  |          marquee_url          |
|---------------------------------------|
| abcd  | /media/marquees/abcd.png      |
| efg   | /media/marquees/efg.png       |

```

I'm fairly confident there are no NULL values in \_rom