Are column and table name case sensitive in MySQL?

Question

If I have a column names called category_id and Category_Id, are they different?

And if I have table called category and

Answer 1

On Unix, table names are case sensitive. On Windows, they are not. Fun, isn't it? Kinda like their respective file systems. Do you think it's a coincidence?

In other words, if you are planning on deploying on a Linux machine, better test your SQL against a Linux-based MySQL too, or be prepared for mysterious "table not found" errors at prod time. VMs are cheap these days.

Field (column) names are case-insensitive regardless.

EDIT: we're talking about the operating system on the MySQL server machine, not client.