Joining three tables in Snowflake - sql

Question

I am trying to join three tables in Snowflake, but getting an error on a third one, and not sure if I used a good key :
select
a.CALENDAR_DATE
, a.SALES_DOCUMENT
, a.DOCUMENT_NUMBER_CROSS_BORDER
, *bAUBEL
, *b.NETWR_ship*
, a.Delivery_time
, a.Route_label
, ue.order_ID
from DWHM_MALLGROUP.DM_LOG.SHIPMENTS a
left join (
select
AUBEL,
sum(NETWR) as NETWR_ship
from DWHM_MALLGROUP.SRC_SAP_ERP."2LIS_13_VDITM"
where MATNR in ('10027', '10200', '10402', '10500', '10602', '10603', '10650', '10700')
group by AUBEL
) b
on a.DOCUMENT_NUMBER_CROSS_BORDER = b.AUBEL
where
a.CALENDAR_DATE >= '2020-04-01'
and a.ROUTE in ('CZSK12', 'CZSK21', 'CZSK22', 'CZSK23', 'CZSK24', 'CZSK25', 'CZSK26', 'CZSK27', 'CZSK28', 'CZSK29', 'CZSK30', 'CZSK32', 'CZSK33', 'CZSK34', 'CZSK51', 'CZSK53', 'CZSK54', 'CZSK56')
group by a.CALENDAR_DATE, a.SALES_DOCUMENT, a.DOCUMENT_NUMBER_CROSS_BORDER, b.AUBEL, b.NETWR_ship, a.delivery_time, a.Route_LABEL
left join "DWHM_MALLGROUP"."DM_COMMERCIAL"."UNIT_ECONOMICS" as ue
ON a.SALES_DOCUMENT = ue.order_id
where ue.country = 'SI' and ue.delivery_date >= '2019-08-01'

Answer 1

Your 2nd LEFT JOIN should be moved up to before the WHERE clause:
select
a.CALENDAR_DATE
, a.SALES_DOCUMENT
, a.DOCUMENT_NUMBER_CROSS_BORDER
, b.AUBEL
, b.NETWR_ship
, a.Delivery_time
, a.Route_label
, ue.order_ID
from DWHM_MALLGROUP.DM_LOG.SHIPMENTS a
left join (
select
AUBEL,
sum(NETWR) as NETWR_ship
from DWHM_MALLGROUP.SRC_SAP_ERP."2LIS_13_VDITM"
where MATNR in ('10027', '10200', '10402', '10500', '10602', '10603', '10650', '10700')
group by AUBEL
) b
on a.DOCUMENT_NUMBER_CROSS_BORDER = b.AUBEL
left join "DWHM_MALLGROUP"."DM_COMMERCIAL"."UNIT_ECONOMICS" as ue
ON a.SALES_DOCUMENT = ue.order_id
where
a.CALENDAR_DATE >= '2020-04-01'
and a.ROUTE in ('CZSK12', 'CZSK21', 'CZSK22', 'CZSK23', 'CZSK24', 'CZSK25', 'CZSK26', 'CZSK27', 'CZSK28', 'CZSK29', 'CZSK30', 'CZSK32', 'CZSK33', 'CZSK34', 'CZSK51', 'CZSK53', 'CZSK54', 'CZSK56')
and ue.country = 'SI' and ue.delivery_date >= '2019-08-01'
group by a.CALENDAR_DATE, a.SALES_DOCUMENT, a.DOCUMENT_NUMBER_CROSS_BORDER, b.AUBEL, b.NETWR_ship, a.delivery_time, a.Route_LABEL
NOTE: I am not familiar with the *b that you have in the SELECT clause... it looks like another typo to me, so I removed it.
If you are trying to perform the aggregate (GROUP BY) before the 2nd LEFT JOIN, then you can use a CTE:
WITH CTE_1 AS (
select
a.CALENDAR_DATE
, a.SALES_DOCUMENT
, a.DOCUMENT_NUMBER_CROSS_BORDER
, b.AUBEL
, b.NETWR_ship
, a.Delivery_time
, a.Route_label
from DWHM_MALLGROUP.DM_LOG.SHIPMENTS a
left join (
select
AUBEL,
sum(NETWR) as NETWR_ship
from DWHM_MALLGROUP.SRC_SAP_ERP."2LIS_13_VDITM"
where MATNR in ('10027', '10200', '10402', '10500', '10602', '10603', '10650', '10700')
group by AUBEL
) b
on a.DOCUMENT_NUMBER_CROSS_BORDER = b.AUBEL
where
a.CALENDAR_DATE >= '2020-04-01'
and a.ROUTE in ('CZSK12', 'CZSK21', 'CZSK22', 'CZSK23', 'CZSK24', 'CZSK25', 'CZSK26', 'CZSK27', 'CZSK28', 'CZSK29', 'CZSK30', 'CZSK32', 'CZSK33', 'CZSK34', 'CZSK51', 'CZSK53', 'CZSK54', 'CZSK56')
group by a.CALENDAR_DATE, a.SALES_DOCUMENT, a.DOCUMENT_NUMBER_CROSS_BORDER, b.AUBEL, b.NETWR_ship, a.delivery_time, a.Route_LABEL
) c1
select
c1.CALENDAR_DATE
, c1.SALES_DOCUMENT
, c1.DOCUMENT_NUMBER_CROSS_BORDER
, c1.AUBEL
, c1.NETWR_ship
, c1.Delivery_time
, c1.Route_label
, ue.order_ID
left join "DWHM_MALLGROUP"."DM_COMMERCIAL"."UNIT_ECONOMICS" as ue
ON c1.SALES_DOCUMENT = ue.order_id
and ue.country = 'SI' and ue.delivery_date >= '2019-08-01'
This can (and should, IMO) be cleaned up some more, but I am trying to address the question you asked about joining 3 tables.

Answer 2

There are multiple issues with the SQL.
, *bAUBEL
, *b.NETWR_ship*
we only use * for selecting all fields from a table. For example select A.* , B.col1 from Table_a A , Table_B
sequence for join is
SELECT
FROM Table
JOIN other Table
JOIN Condition
WHERE
GROUP BY
HAVING
Try this SQL
SELECT
a.calendar_date,
a.sales_document,
a.document_number_cross_border,
b.aubel,
b.netwr_ship,
a.delivery_time,
a.route_label,
ue.order_id
FROM
dwhm_mallgroup.dm_log.SHIPMENTS a
left join (
select
AUBEL,
sum(NETWR) as NETWR_ship
from DWHM_MALLGROUP.SRC_SAP_ERP."2LIS_13_VDITM"
where MATNR in ('10027', '10200', '10402', '10500', '10602', '10603', '10650', '10700')
group by AUBEL
) b
on a.DOCUMENT_NUMBER_CROSS_BORDER = b.AUBEL
left join "DWHM_MALLGROUP"."DM_COMMERCIAL"."UNIT_ECONOMICS" as ue ON a.sales_document = ue.order_id
WHERE
a.calendar_date >= '2020-04-01'
AND a.route IN (
'CZSK12',
'CZSK21',
'CZSK22',
'CZSK23',
'CZSK24',
'CZSK25',
'CZSK26',
'CZSK27',
'CZSK28',
'CZSK29',
'CZSK30',
'CZSK32',
'CZSK33',
'CZSK34',
'CZSK51',
'CZSK53',
'CZSK54',
'CZSK56'
)
AND ue.country = 'SI'
AND ue.delivery_date >= '2019-08-01'
GROUP BY
a.calendar_date,
a.sales_document,
a.document_number_cross_border,
b.aubel,
b.netwr_ship,
a.delivery_time,
a.route_label
ue.order_id