math - ColdFusion 9 - SQL Statement - Boolean Logic -

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I plugged it on. And this would be a simple little mathematical logic problem. But for my life I can not get it to work properly.

Trying to avoid double booking material in the booking system. Current code ... 

  and schdate = #createODBCDate (schdate) # and (schstart & gt; = #createODBCTime (time) # and actend & lt; = #createODBCTime (actend) #)   
 Basically try to do a check - if say that the start time is 2:00 and ends at 3 o'clock ... I have to check whether I Trying to overlap the book ... Try to say book at 2:15 pm ... stop saying this - conflict  
 Thought this is a mathematical argument - not a coldfusion is ... an air brain today ...  
 Thanx for direct - I think I would have thought this - still test ... seems to work under Dev link is given .  
  and schdate = #createODBCDate (schdate) #and schstart & lt; #contentabacktime (acting) #andactand & gt; #createODBCTime (time) #    
 
 
  Update:  < / P> 
 Below is a little more intuitive of the original query, basically reverse the comparison:  
  where date is column = # requested date # and start time column < # Requested end time #and endtime columns & gt; # Requested start time #   
 
 I remember a great thread on this subject: (ASCII illustration is a good touch :) Assume that your booking does not last for several days, It should work fine for the right time.  
 It is normal view to check each type of conflict:  
     
  •  Overlap: i.e. requested at 9-10, but for 9: 30-11 AM There is a reservation from  
  •  Falls within: the requested time is 10-11 AM, but there is an existing reservation for 9-12 PM  
  •  included: either requested time 12-5PM , But a more elegant approach to the 2 - 3 PM   
     link has been mentioned. Basically, it reduces all those steps for a single filter.    Where EF & gt; = SD and FS & lt; = ED   
     If it finds a match, then you know that there is a conflict. The translation should look like this (untouchable).  
      Select from few columns Columns where # requested time # & gt; = Starttime column and # requested start date # & lt; = End time column and date column # # Requested date #   
      NB:  I deliberately left for clarity  cfqueryparam  obviously I I would suggest using it in your actual query.

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