January 25, 2020 at 9:59 am
Ah... one more thing... REPLACE can make sucking sounds for performance even if the default collation is used. It's performance can usually be increased by quite a bit when you're looking for non-alpha characters to replace by using a binary collation in the formula, as in the following (obviously, not totally tested because I don't have your data table)...
I find that the lung puncture like sucking sound is normally in direct relation to (length + number of operations), not concerned on VARCHAR(7)
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January 25, 2020 at 9:58 pm
It still makes a difference even on something small when you're working with millions of rows.
--Jeff Moden
Change is inevitable... Change for the better is not.
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