---
title: "DATEFROM(A,B,C)"
slug: "engineeringdatefunction2-6"
updated: 2025-04-15T16:08:34Z
published: 2025-04-15T16:08:34Z
canonical: "docs.datajet.app/engineeringdatefunction2-6"
---

> ## 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.

# DATEFROM(A,B,C)

## Date Transform: DATEFROM(A,B,C)

## Create a Date Field from Year(A), Month(B) and Day(C)

## Purpose

Use this function to:

- Construct date fields from integer parts

## Return Value

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

```shell
Example Return Value:  2019-05-08
```

![](https://cdn.document360.io/73b6469b-c1e4-47e9-aa65-986c8ebd17ca/Images/Documentation/DATEFROM_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”: “DATEFROM(A,B,C)” | DATEFROM(A,B,C) |
| **A** | “p2”: “YearFieldName” “p2”: “#YYYY” | Required. Integer value specifying the year component of a date. *Supports:* - **DataType:** Discrete - **Field Type:** Integer - **Fixed Value:** #YYYY e.g. #2021 |
| **B** | “p3”: “MonthFieldName” “p3”: “#MM” | Required. Integer value specifying the month component of a date. *Supports:* - **DataType:** Discrete - **Field Type:** Integer - **Fixed Value:** #MM e.g. #12 |
| **C** | “p4”: “DayFieldName” “p4”: “#DD” | Required. Integer value specifying the day component of a date. *Supports:* - **DataType:** Discrete - **Field Type:** Integer - **Fixed Value:** #DD e.g. #17 |

## JSON Sample

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

## Usage Notes

A mixture of FIXED_VALUES and Database fields can be used to create the new date field.

Date fields can also be created from strings using the **DateFromString** function.

## Example

| Example | Details |
| --- | --- |
| **Description** | Create a random date field |
| **Input** | - Table: = [transactions] - Function: = DateTransform - **DateTimeFunction: = DATEFROM(A,B,C)** - A:= [transactions].[year] - B: = [transactions].[Random_Month2] - C: = [transactions].[Random_Day2] - Name: = Random_Date |
| **Sample** | ![](https://cdn.document360.io/73b6469b-c1e4-47e9-aa65-986c8ebd17ca/Images/Documentation/DATEFROM_Example.PNG) |