DATECOMPARE |
Description Performs a full date/time comparison of two dates.
Returns -1, if date1 is earlier than date2 0, if date1 is equal to date2 1, if date1 is later than date2
Category Date and time functions
Function syntax
    DateCompare("date1", "date2" [, "datePart"])
See also CreateDateTime, DatePart
Parameters
Usage 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.
Example
    <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" method="post">
    <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>

DATE1 |

Date/time object, in the range 100 AD-9999 AD.

DATE2 |

Date/time object, in the range 100 AD-9999 AD.

DATEPART |

Optional. String. Precision of the comparison.

- s Precise to the second (default)
- n Precise to the minute
- h Precise to the hour
- d Precise to the day
- m Precise to the month
- yyyy Precise to the year