|But, these hashes will not have a fixed number of elements; do I need to put a string of ?, ?,
... , ? in my statement and then just pass a list through execute? Or is there some
placeholder that says "put a list here"?
Well, if there is not an unholy number of combinations of
columns, then this is not a bad solution. If there is going to be
a large number of 'different' statements prepared, then
this is still ok, but I would just use prepare() instead of prepare_cached.
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