the number of refills for SQL statements

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  Guy - 11 GR on Windows2005 2, 64-bit.
  
  BILLING_RECORD_KPN_ESP - is a monthly partitioned table.
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  SQL > select / * + index (BILLING_RECORD_KPN_ESP BILLING_RECORD_IDX #DATE) * /.
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  5 m
  
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  ------------------ ------------
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  -> > Here I can see only '2041' records for Jan/20. But in the query below, it shows "192610" for the same date.
  
  Why is this difference in the number of records?
  
  SQL > select / * + index (BILLING_RECORD_KPN_ESP BILLING_RECORD_IDX #DATE) * /.
  (trunc (CHARGE_DATE)) CHARGE_DATE,
  2 count (1) Record_count
  3. FOR "RATOR_CDR." "" BILLING_RECORD_KPN_ESP ".
  "4 where CHARGE_DATE > 20 January 2013."
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  6 order by trunc (CHARGE_DATE)
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  ------------------ ------------
  192610 20 January 13-> > more records here
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  27 JANUARY 13 10478
  28 JANUARY 13 39158
  
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  Because in the second example you also select rows that have a nonzero component.

  The first example selects only rows that are 00:00:00

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