In MySQL query, VARCHAR(100) gets output as “[partnumber]” although in a query with more columns, it is still shown as ‘p-12345’

This is a bad question since I only made a mistake in selecting by chance a client that had garbage data and must have changed the where condition during tests, and it was also a problem of a join that I did not even mention in the question that led to so many of the strange [partnumber] entries that the limit 10 query showed only those. So that I thought the whole column would have this value. I am not sure whether I should delete it. It might also help someone else who has garbage data without knowing about it. You may vote to close the question if you think it has wasted your time. For I see myself that this can be a waste of time reading.