How to make GROUP BY in a cypher query?

Question

I want to translate a SQL query to cypher. Please, is there any solution to make GROUP BY in cypher?

    SELECT dt.d_year, 
           item.i_brand_id          brand_id, 
           item.i_brand             brand, 
           Sum(ss_ext_discount_amt) sum_agg 
    FROM   date_dim dt, 
   store_sales, 
   item 
    WHERE  dt.d_date_sk = store_sales.ss_sold_date_sk 
    AND store_sales.ss_item_sk = item.i_item_sk 
    AND item.i_manufact_id = 427 
    AND dt.d_moy = 11 
    GROUP  BY dt.d_year, 
      item.i_brand, 
      item.i_brand_id 
   ORDER  BY dt.d_year, 
      sum_agg DESC, 
      brand_id;

Answer 1

In Cypher, GROUP BY is done implicitly by all of the aggregate functions. In a WITH/RETURN statement, any columns not part of an aggregate will be the GROUP BY key.

So for example in

MATCH (n:Person)
RETURN COUNT(n), n.name, n.age

The count will count all nodes that have the same name and age. If I instead do

MATCH (n:Person)
RETURN COUNT(n), n.name, MIN(n.age), MAX(n.age)

I will get the count of how many people have the same name, as well as the age range for that name.