---
title: Average
---

`AVG` computes the average value over a specific column:

```sql
SELECT AVG(rating) FROM mock_items
WHERE id @@@ paradedb.all();
```

<Note>
  The field being averaged, in this case `rating`, must be indexed as
  [fast](/documentation/indexing/fast_fields).
</Note>

By default, `AVG` ignores null values. Use `COALESCE` to include them in the final average:

```sql
SELECT AVG(COALESCE(rating, 0)) FROM mock_items
WHERE id @@@ paradedb.all();
```

To verify that `AVG` was pushed down, look for a `ParadeDB Aggregate Scan` with `average` in the `EXPLAIN` output:

```sql
EXPLAIN SELECT AVG(rating) FROM mock_items
WHERE id @@@ paradedb.all();
```

```sql Expected Response
                                       QUERY PLAN
----------------------------------------------------------------------------------------
 Custom Scan (ParadeDB Aggregate Scan) on mock_items  (cost=0.00..0.00 rows=0 width=32)
   Index: search_idx
   Tantivy Query: {"with_index":{"query":"all"}}
   Aggregate Definition: {"0":{"avg":{"field":"rating"}}}
(4 rows)
```