docs: add a description about the couchdb lambda view (#1418)

* docs: add a description about the couchdb lambda view

* Update content/en/apps/guides/data/analytics/building-dbt-models.md

Co-authored-by: Andra Blaj <andra@medic.org>

---------

Co-authored-by: Andra Blaj <andra@medic.org>

content/en/apps/guides/data/analytics/building-dbt-models.md

@@ -44,6 +44,9 @@ This table can be used to get any field from a CouchDB document; however, it is
 |`type`|The general type of the document, see below|
 |`doc`| JSON of the source document|
 
+### `couchdb_lambda_view`
+This is a [lambda view](https://discourse.getdbt.com/t/how-to-create-near-real-time-models-with-just-dbt-sql/1457) with the same structure as the `couchdb` table. It contains the latest data coming in from CouchDB, and is useful for near-real-time data. However, to take full advantage of it, all downstream models built on top of it need to be views. This comes with a few drawbacks, such as not being able to index columns and performance issues when building views on top of views.
+
 ### `data_record`
 All form responses are stored in the `data_record` table; see more details [in the database schema conventions]({{< ref "core/overview/db-schema#reports" >}}).
 This table contains columns for the contact who made the report, the parent of that contact, the report data, and a copy of fields in `jsonb` format.