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int year = DateTime.Now.Year;
int month = DateTime.Now.Month;
int day = DateTime.Now.Day;
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select count(id) from info where year(addtime)="+year+" and month(addtime)="+month+" and day(addtime)="+day+"
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select count(id) from info where year(addtime)=" + year + " and month(addtime)=" + month + " and day(addtime)=" + (day - 1) + "
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