Use this command to use lookup fields in a search and see the lookup fields in the field sidebar.

The `inputlookup` command retrieves and returns the raw contents of a lookup file as standalone search results rather than enriching existing events, so its output fields do not appear in the field sidebar alongside indexed event fields.

The `lookup` command joins a lookup table to existing search events by matching on a specified field, appending the matched lookup columns to each event and making them visible in the field sidebar. This is the correct command when the goal is to enrich events with additional reference data during a search.