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# AuditOperator

Enumeration of comparison operators supported in audit filter conditions for change history queries.

```
string AuditOperator
```

## Discussion

The `AuditOperator` determines how the system applies the filter `values` against the target field. Use `GREATER_THAN` or `LESS_THAN` with a single timestamp for an open-ended `eventTime` filter.

Every valid `AuditQuery` must include at least one filter on `eventTime` using `BETWEEN`, `GREATER_THAN`, or `LESS_THAN`. All other filters use `IN`.

The endpoint that accepts an `AuditFilter` is [`Query Change History`](/documentation/Apple-Ads-Platform-API/Query-audit-summary-_-grouped-by-transaction).

---

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