Contents > CFML Reference > ColdFusion Functions > DateCompare

DateCompare

Performs a full date/time comparison of two dates.

• -1, if date1 is less than date2
• 0, if date1 is equal to date2
• 1, if date1 is greater than date2

Date and time functions

DateCompare("date1", "date2" [, "datePart"])

CreateDateTime, DatePart

When passing a date/time object as a string, you must enclose it in quotation marks. Otherwise, it is interpreted as a numeric representation of a date/time object.

<h3>DateCompare Example</h3>
<p>The DateCompare function compares two date/time values.
<cfif IsDefined("FORM.date1")>
   <cfif IsDate(FORM.date1) and IsDate(FORM.date2)>
      <cfset comparison = DateCompare(FORM.date1, FORM.date2, FORM.precision)>

<!--- switch on the variable to give various responses --->
      <cfswitch expression = #comparison#>
         <cfcase value = "-1">
            <h3><cfoutput>#DateFormat(FORM.date1)# 
            #TimeFormat(FORM.date1)#</cfoutput> (Date 1) is
            earlier than <cfoutput>#DateFormat(FORM.date2)#
            #TimeFormat(FORM.date2)#</cfoutput> (Date 2)</h3>
            <I>The dates are not equal</I>
         </cfcase>
         <cfcase value = "0">
            <h3><cfoutput>#DateFormat(FORM.date1)#
            #TimeFormat(FORM.date1)#</cfoutput> (Date 1) is equal
            to <cfoutput>#DateFormat(FORM.date2)#
            #TimeFormat(FORM.date2)#</cfoutput> (Date 2)</h3>
            <I>The dates are equal!</I>
         </cfcase>
         <cfcase value = "1">
            <h3><cfoutput>#DateFormat(FORM.date1)#
            #TimeFormat(FORM.date1)#</cfoutput> (Date 1) is later
            than <cfoutput>#DateFormat(FORM.date2)#
            #TimeFormat(FORM.date2)#</cfoutput> (Date 2)</h3>
            <I>The dates are not equal</I>
         </cfcase>
         <CFDEFAULTCASE>
            <h3>This is the default case</h3>
         </CFDEFAULTCASE>
      </cfswitch>
   <cfelse>
      <h3>Enter two valid date values</h3>
   </cfif>
</cfif>

<form action = "datecompare.cfm">
<hr size = "2" color = "#0000A0">
<p>Date 1
<br><input type = "Text" name = "date1" 
      value = "<cfoutput>#DateFormat(Now())# #TimeFormat(Now())#
</cfoutput>">
<p>Date 2
<br><input type = "Text" name = "date2" 
      value = "<cfoutput>#DateFormat(Now())# #TimeFormat(Now())#
</cfoutput>">
<p>Specify precision to the:
<br><select name = "precision">
         <option value = "s">
            Second
         </option>   
         <option value = "n">
            Minute
         </option>   
         <option value = "h">
            Hour
         </option>   
         <option value = "d">
            Day
         </option>
         <option value = "m">
            Month
         </option>   
         <option value = "yyyy">
            Year
         </option>
   </select>
<p><input type = "Submit" value = "Compare these dates" name = ""> 
<input type = "reset">
</form>

Contents > CFML Reference > ColdFusion Functions > DateCompare

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