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If you face the same problem that the result is less by one, changing the language you're using will solve it, I was using DB2 and it was always wrong. changed it to MySQL and it did work.
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The Blunder
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If you face the same problem that the result is less by one, changing the language you're using will solve it, I was using DB2 and it was always wrong. changed it to MySQL and it did work.