I actually answered a similar question earlier this morning.
Both of you got the same message and it is fairly clear about why it happens.
The only missing part is how is simply that you need to specify with what table you’re working on.
USE myDatabase; where myDatabase is of course your database name.
Now @keelo also answered there and I notice you put a sql_ prefix in front of the database name. I did not use MySQL for over a decade but AFAIK the raw name is enough. Is there any new rule / feature / convention related to referring databases in MySQL ?
Could you please tell me what would SHOW DATABASES; output as name to your orders DB?