# Calc children: Sum

Sum of values in underplaced data

### Properties

- Type: [Parent/child](https://docs.tsnocode.com/books/field-type-reference/chapter/parentchild)
- Groupable: No
- Show in lists: Yes
- Searchable: Yes
- Requires configuration: Yes

## <span class="mw-headline" id="bkmrk-user-interface-1">User interface</span>

<span class="mw-headline">Field in show mode</span>

<span class="mw-headline">\[INSERT IMAGE\]</span>

Due to its nature this field has no special editing mode.

## <span class="mw-headline" id="bkmrk-configuration-1">Configuration</span>

[![image.png](https://docs.tsnocode.com/uploads/images/gallery/2025-07/scaled-1680-/yDxDGOzmjFwkF6dX-image.png)](https://docs.tsnocode.com/uploads/images/gallery/2025-07/yDxDGOzmjFwkF6dX-image.png)

Required:

- Child value expression refers to a field system name. Example "HOURS"

Options:

- Additional criterions: Additional SQL statement parameter. Example "PROJECT &lt;&gt; 10029"

## <span class="mw-headline" id="bkmrk-developer-info-1">Developer info</span>

- FeltTypeID: 210
- SQL datatype: N/A
- Class name: FieldSubformLinesSum