> ## Documentation Index > Fetch the complete documentation index at: https://alphacastio.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Filter Entity > Keep only the entities you want to work with — countries, categories or tickers — and drop the rest. The **Filter Entity** step narrows a dataset down to specific entity values, so the following steps only process the rows you care about. In this example, you pick the category you want to work with: Selecting entity values to keep From this point on the pipeline carries only "Capital Accounts" — every other entity is dropped. Click **Save** and the pipeline reruns with the filter applied. Pipeline result after filtering to a single entity Entity columns are the columns that uniquely identify a row. See [Regroup entities](/steps/regroup-entities) if you need to collapse an entity rather than filter it. ## Next steps Filter by value instead of by entity. Restrict the pipeline to a date range.