I'm attempting to use a parameterized updategram and default mapping to insert data into an image-type column in a database, but so far I've been unsuccessful. Why isn't this technique working?

You can use an updategram to insert data into an image field, but you can't use default mapping or a parameterized updategram. Let's look at the limitations of default mapping and parameterized updategrams and how you can achieve your goal.

Def...