API/Queries/Attributes.md

@@ -589,7 +589,6 @@ The only values allowed are `0` or `1`.
 {
   "attrs": {
     "join": "system__entity__module",
-    "columns": "me.name",
     "+select": [
       {
         "count": "system__entity__module.id",
@@ -604,7 +603,15 @@ The only values allowed are `0` or `1`.
 }
 ```
 
-This will add `GROUP BY me.name` to the query.
+This will add a group by all column names of system.module to the query:
+```sql
+SELECT
+ me.id, me.name, me.label, me.description, me.modifying_action, me.modifying_client, me.modification_time, me.instance_entity, me.successor,
+ COUNT( system__entity__module.id ) AS entity_count
+FROM system.module() me
+LEFT JOIN system.entity system__entity__module ON system__entity__module.module = me.id
+GROUP BY me.id, me.name, me.label, me.description, me.modifying_action, me.modifying_client, me.modification_time, me.instance_entity, me.successor
+```
 
 # Permitted Column Names