---
title: "ABSDAYSDIFF(A,B)"
slug: "engineeringdatefunction2"
updated: 2021-10-14T16:40:46Z
published: 2021-10-14T16:40:46Z
canonical: "docs.datajet.app/engineeringdatefunction2"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.datajet.app/llms.txt
> Use this file to discover all available pages before exploring further.

# ABSDAYSDIFF(A,B)

## Date Transform: ABSDAYSDIFF(A,B)

## Returns absolute difference in days between 2 dates.

## Purpose

Use this function to:

- Calculate the number of days between 2 dates

## Return Value

| Property | Value |
| --- | --- |
| **FieldType** | Integer |
| **FieldSize** | Low / Med / High |
| **DataType** | Discrete |
| **DataSize** | Short / Integer |

```shell
Example Return Value: 0...N
where
N = maximum days difference between the 2 dates
```

## Parameters

| Parameter | JSON | Description |
| --- | --- | --- |
| **Table** | “targetTable”: “MyTableName” | The target table on which the new field will be created |
| **Filter** | “dataset”: {DataSet_JSON} | Optional. If a filter is applied, records not in the filter recordset will be returned as null. |
| **DateTimeFunction** | “p1”: “ABSDAYSDIFF(A,B)” | **ABSDAYSDIFF(A,B)** |
| **A** | “p2”: “DateFieldLower” | Required. Valid Inputs: Date Field, DateTime Field The lower bound date field. The order in which date fields A and B are specified does not matter. |
| **B** | “p3”: “DateFieldHigher” | Required. Valid Inputs: Date Field, DateTime Field The upper bound date field. The order in which date fields A and B are specified does not matter. |

## JSON Sample

![](https://cdn.document360.io/73b6469b-c1e4-47e9-aa65-986c8ebd17ca/Images/Documentation/AbsDateDiff_JSON.PNG)

## Usage Notes

The order in which the date fields for parameters A and B are specified does not matter.

## Example

| Example | Details |
| --- | --- |
| **Description** | Calculate number of days between this transaction and last transaction |
| **Input** | - Table: = [transactions] - Function: = DateTransform - **DateTimeFunction: = ABSDAYSDIFF(A,B)** - A:= [transactions].[last_response] - B: = [transactions].[first_transaction] - Name: = AgeOfTransaction |
| **Sample** | ![](https://cdn.document360.io/73b6469b-c1e4-47e9-aa65-986c8ebd17ca/Images/Documentation/AbsDateDiff_Sample1.PNG) |