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adoquery1.SQL.Add('select * from(select * from 记录表 where 记录时间 between "'+datetostr(datetimepicker3.Date)+'" and "'+datetostr(datetimepicker4.Date)+'") where 设备类型="电话"');
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label25.Caption:=inttostr(adoquery1.recordcount)+' 次';
怎么在设定的时间段内统计的记录数总是比实际的记录数少几条?
adoquery1.SQL.Add('select * from(select * from 记录表 where 记录时间 between "'+datetostr(datetimepicker3.Date)+'" and "'+datetostr(datetimepicker4.Date)+'") where 设备类型="电话"');
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label25.Caption:=inttostr(adoquery1.recordcount)+' 次';
怎么在设定的时间段内统计的记录数总是比实际的记录数少几条?