---
title: "DADD(A,B)"
slug: "engineeringdatefunction2-4"
updated: 2021-10-14T11:11:51Z
published: 2021-10-14T11:11:51Z
canonical: "docs.datajet.app/engineeringdatefunction2-4"
---

> ## 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.

# DADD(A,B)

## Date Transform: DADD(A,B)

## Returns the date created when adding B days to Date A

## Purpose

Use this function to:

- Create new date fields according to mathematical rules
- Create dates that are a specified number of days before or after a source date

## Return Value

| Property | Value |
| --- | --- |
| **FieldType** | Date |
| **FieldSize** | Med |
| **DataType** | Short |
| **DataSize** | Discrete |

```shell
Example Return Value: 2021-01-05
```

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

## 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”: “DADD(A,B)” | DADD(A,B) |
| **A** | “p2”: “DateFieldName” “p2”: “#YYYY-MM-DD" | Required. *Supports:* - **DataType:** Discrete / Continuous - **Field Type:** Integer, LongInteger - **Fixed Value:** #YYYY-MM-DD, e.g. #2021-04-05 |
| **B** | “p3”: “IntegerFieldName” “p3”: “#DAYS” | Required. *Supports:* - **DataType:** Discrete / Continuous - **Field Type:** Integer, LongInteger - **Fixed Value.** #INTERVAL e.g. #7 |

## JSON Sample

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

## Usage Notes

To increase or decrease date by a fixed amount, use the #INTERVAL notation for B: #7, #-8

To increase or decrease by a row specific amount, use a field for B.

DateTime fields will be turned into Date Fields.

## Example

| Example | Details |
| --- | --- |
| **Description** | Calculate date 1 week after shipping |
| **Input** | - Table: = [transactions] - Function: = DateTransform - **DateTimeFunction: = DADD(A,B)** - A:= [transactions].[dtShipping] - B: = #7 - Name: =weekaftershipping |
| **Sample** | ![](https://cdn.document360.io/73b6469b-c1e4-47e9-aa65-986c8ebd17ca/Images/Documentation/DADD_Example.PNG) |