DateAdd

Description

Adds units of time to a date.

Returns

A date/time object.

See also

DateConvert, DatePart, CreateTimeSpan

History

ColdFusion MX 6.1: Added the datepart character L or l to represent milliseconds.

Parameters

Parameter	Description
datepart	String:
	yyyy: Year
	q: Quarter
	m: Month
	y: Day of year
	d: Day
	w: Weekday
	ww: Week
	h: Hour
	n: Minute
	s: Second
	l: Millisecond
number	Number of units of datepart to add to date (positive, to get dates in the future;
	negative, to get dates in the past)
date	Date/time object, in the range 100 AD-9999 AD.

Usage

The datepart specifiers y, d, and w add a number of days to a date.

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

<!--- This example shows the use of DateAdd --->
<cfparam name="value" default="70">
<cfparam name="type" default="m">

<!--- if numbers passed, then use those --->
<cfif IsDefined("form.value")>
   <cfset value = form.value>
</cfif>
<cfif IsDefined("form.type")>
   <cfset type = form.type>
</cfif>


<cfquery name="GetMessages" datasource="cfsnippets">
SELECT    UserName, Subject, Posted
FROM   Messages
</cfquery>

<p>This example uses DateAdd to determine when a message in
the database will expire. Currently, messages older
than <cfoutput>#value#</cfoutput>

<cfswitch expression="#type#">
   <cfcase value="yyyy">years</cfcase>
   <cfcase value="q">quarters</cfcase>
   <cfcase value="m">months</cfcase>
   <cfcase value="y">days of year</cfcase>
   <cfcase value="w">weekdays</cfcase>
   <cfcase value="ww">weeks</cfcase>
   <cfcase value="h">hours</cfcase>
   <cfcase value="n">minutes</cfcase>
   <cfcase value="s">seconds</cfcase>
   <cfdefaultcase>years</cfdefaultcase>
</cfswitch>
 are expired.

<table>
<tr>
   <td>UserName</td>
   <td>Subject</td>
   <td>Posted</td>
</tr>
<cfoutput query="GetMessages">
<tr>
   <td>#UserName#</td>
   <td>#Subject#</td>
   <td>#Posted# <cfif DateAdd(type, value, posted) LT Now()><font
color="red">EXPIRED</font></cfif></td>
</tr>
</cfoutput>
</table>

<cfform action="#CGI.Script_Name#" method="post">

Select an expiration value:
<cfinput type="Text" name="value" value="#value#" message="Please enter whole
numbers only" validate="integer" required="Yes">
<select name="type">
   <option value="yyyy">years
   <option value="m" selected>months
   <option value="d">days
   <option value="ww">weeks
   <option value="h">hours
   <option value="n">minutes
   <option value="s">seconds
</select>

<input type="Submit" value="Submit">
</cfform>

datepart


String: yyyy: Year q: Quarter m: Month y: Day of year d: Day w: Weekday ww: Week h: Hour n: Minute s: Second l: Millisecond

number


Number of units of datepart to add to date (positive, to get dates in the future; negative, to get dates in the past)