As the other tutors have suggested, look into doing the SQL updates
directly, rather than format strings of SQL commands.

A major reason is because strings do not natively support the
representation of nested, grammatical things like sentences or SQL
commands.  It's really easy to write a string formatting program that works
on simple input but will break spectacularly on real-world data.

Do a web search for the term "Bobby Tables" for a concrete explanation of
the problem.
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