---
title: "copydowndiscrete"
slug: "copydowndiscrete"
updated: 2026-06-08T17:08:43Z
published: 2026-06-08T17:08:43Z
canonical: "docs.datajet.app/copydowndiscrete"
---

> ## 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.

# copydowndiscrete

Copies a field from the primary table to the foreign table

| Key | Value(s) | Description |
| --- | --- | --- |
| method | "BuildBakedField" |  |
| function | "copydowndiscrete" | Copies a field from the primary table to the foreign table |
| targetTable | "ForeignTableName" | Name of table on which to create field. Must be the "Many" side of a "One to Many" join. |
| name | "TargetFieldName" | Name of field to create |
| dataset{} | {} | Dataset selecting which records to copy |
| overwrite | true/false |  |
| p1 | "SourceFieldName" | Source field name |
| p2 | "SourceTableName" | Source table name |

```json
{
  "method": "BuildBakedField",
  "function": "copydowndiscrete",
  "targetTable": "%FTABLE%",
  "name": "%RANKNAME%",
  "overwrite": false,
  "p1": "%RANKNAME%",
  "p2": "constructor%DSTAMP%",
  "project": "SmallTrans"
}
```

## Related

- [CopyDownFromTemplate](/copydownfromtemplate.md)
- [CopyUp](/copyup.md)
- [CopyUpFromTemplate](/copyupfromtemplate.md)
- [Copy Up (F->P)](/copy-up.md)