Bizare date field behavior in an Oracle database.

Question

I have this bizare data problem quering an oracle date field.
Look at these two result sets.
Missing Two records.:
COUNTY_CD
CONAME
FILE_DATE
TRANSMISSIONS
RECORDS
NO_ERROR_RECORDS
ERROR_RECORDS
TOTAL_ERRORS
03   
AMADOR                    
07-NOV-11            
10                
405               
396               
9                 
9                 
10   
FRESNO                    
07-NOV-11            
1                 
204               
200               
4                 
4                 
16   
KINGS                     
07-NOV-11            
3                 
1296              
1110              
186               
194               
20   
MADERA                    
07-NOV-11            
1                 
552               
535               
17                
17                
51   
SUTTER                    
07-NOV-11            
1                 
43                
5                 
38                
38                
WHERE
        r.file_date BETWEEN TO_DATE('2011-11-07 00:00:00','YYYY-MM-DD HH24:MI:SS')
                        AND TO_DATE('2011-11-07 15:00:00','YYYY-MM-DD HH24:MI:SS')
All Expected records
COUNTY_CD
CONAME
FILE_DATE
TRANSMISSIONS
RECORDS
NO_ERROR_RECORDS
ERROR_RECORDS
TOTAL_RECORDS
03   
AMADOR                    
07-NOV-11            
10                
405               
396               
9                 
9                 
10   
FRESNO                    
07-NOV-11            
1                 
204               
200               
4                 
4                 
16   
KINGS                     
07-NOV-11            
3                 
1296              
1110              
186               
194               
20   
MADERA                    
07-NOV-11            
1                 
552               
535               
17                
17                
50   
STANISLAUS                
07-NOV-11            
2                 
17002             
7165              
9837              
10028             
51   
SUTTER                    
07-NOV-11            
1                 
43                
5                 
38                
38                
WHERE
        r.file_date BETWEEN TO_DATE('2011-11-07 00:00:00','YYYY-MM-DD HH24:MI:SS')
                        AND TO_DATE('2011-11-07 15:59:59','YYYY-MM-DD HH24:MI:SS')
Can anybody tell me why looking for recrods by the FILE_DATE field that has no time portion, it is a 'DATE' data type field, would produce different results based on different time parameters passed into the WHERE clause?  This has me really confused and I just can not figure out why this behavior changes which makes me leary to trust a work around solution of just apending random time data to the where clause.
Below it the entire SQL query from the origanal source.
SELECT
r.county_cd,
c.coname,
COUNT(unique r.file_name) AS transmissions,
count(r.use_no) AS records,
count(r.use_no) - count(e.use_no) AS no_error_records,
count(e.use_no) AS error_records,
sum(e.errors) AS total_errors
FROM
raw_pur r INNER JOIN
pur_lookup l
ON (r.use_no = l.use_no AND r.year = l.seq_year) LEFT OUTER JOIN
SELECT
year,
use_no,
count(use_no) AS errors
FROM
errors
WHERE
NOT (error_code = 17 OR error_code = 20 OR error_code = 72 OR error_code = 52 OR
(error_code = 12 AND error_type = 'POSSIBLE') OR
(error_code = 69 AND error_type = 'POSSIBLE') OR
(error_code = 37 AND error_type = 'POSSIBLE') OR
(error_code = 39 AND error_type = 'POSSIBLE'))
GROUP BY
year,
use_no
) e ON (r.year = e.year AND r.use_no = e.use_no) INNER JOIN
county c
ON (r.county_cd = c.county_cd)
WHERE
r.file_date BETWEEN <cfqueryparam value="#form.fromDate#" cfsqltype="cf_sql_date">
AND <cfqueryparam value="#form.toDate#" cfsqltype="cf_sql_date">
GROUP BY
r.county_cd,
c.coname
ORDER BY
r.county_cd

Answer 1

Thanks guys.  The errant records in question do indeed have time portions to the values in the FILE_DATE field, though they are not supposed to and all the other records do not.
Thanks for the suggestion to use the to_char function to suss out the actual, full values. 
It is always so useful to have helpful IDEs (Oracle SQL Developer in my case) that hide information from you.  I was using this to look at the field expecting to find time data, but was not seeing it.  I guess SQL developer is formatting the date-time value for me since this is a date field.  How helpful in a debugging situation.
Now to figure out why these records are in the database in this way in the first place.  Because they are not supposed to be.
Again, thanks for the help.
Ian