# sum command

The sum command produces a numeric total
of a given attribute for all items meeting the optional selection
criteria. If an attribute name (attribute name or number) is not specified,
the total number of characters in the selected items are calculated.
If only the file reference is specified, the total number of characters
in the entire file is calculated, including attribute and value marks.

## Syntax

```
sum file.reference {item.list} attr.name{selection.criteria} {(options)}
```

## Example(s)

```
sum invoices amount (p
```

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Source: https://d3codex.com/access/sum-command/ - part of the D3Codex reference.