Merge branch 'js-add-specs' of https://github.com/dbt-labs/docs.getdb…

…t.com into js-add-specs

website/docs/docs/build/incremental-models.md

@@ -57,6 +57,7 @@ from raw_app_data.events
 {% if is_incremental() %}
 
   -- this filter will only be applied on an incremental run
+  -- (uses > to include records whose timestamp occurred since the last run of this model)
   where event_time > (select max(event_time) from {{ this }})
 
 {% endif %}
@@ -137,6 +138,7 @@ from raw_app_data.events
 {% if is_incremental() %}
 
   -- this filter will only be applied on an incremental run
+  -- (uses >= to include records arriving later on the same day as the last run of this model)
   where date_day >= (select max(date_day) from {{ this }})
 
 {% endif %}