We change our cover_photo field type from BLOB to MEDIUMBLOB to ensure that we can upload photographs that are bigger than 65 KB to it. We then enter the following attributes:

Here, the options are presented as width,height. If we omit the options, the default values are 100,100. The thumbnail generation code preserves the original aspect ratio of the image, so the values entered are the maximum width and height of the generated image. We then upload a .jpeg file in a cell (using instructions from Chapter 6). As a result, we get the following in Browse mode for this table:

This thumbnail can be clicked to reveal the full-size photograph.