INSERT new row consolidate similar rows - sql

Question

Here is what I need to accomplish:
INSERT a new row into t_order by combining two or more rows from the same table (t_order) where all values are the same except for order_id (Identity) and order_number
The New Row will represent a consolidated order.
Two orders going to the same address get combined into one
Example Table before Insert
order_id order_number ship_addrs1 ship_to_zip
-------- ------------ ----------- -----------
1 ABC001 111 1st St 11111
2 ABC002 123 Main St 12345 <--- Source Row
3 ABC003 123 Main St 12345 <--- Source Row
4 ABC004 111 2nd St 11111
Result After Insert (Source orders must remain)
order_id order_number ship_addrs1 ship_to_zip
-------- ------------ ----------- -----------
1 ABC001 111 1st St 11111
2 ABC002 123 Main St 12345
3 ABC003 123 Main St 12345
4 ABC004 111 2nd St 11111
5 ABC005 123 Main St 12345 <--- New Row
I have considered using the following code to accomplish this but not sure what I need to do to consolidate the three rows.
SELECT * INTO tmp_order_cosolidation
FROM t_order
WHERE order_id = 1 AND order_number = ABC002
ALTER TABLE tmp_order_cosolidation
DROP COLUMN order_id, ordern_number
INSERT INTO t_order
SELECT *
FROM tmp_order_cosolidation;
DROP TABLE tmp_order_cosolidation ;
Thank you in advance for your answers

Answer 1

Your order table should have a few more columns to show whether the order is a consolidation, eligible for consolidation, or has already been consolidated. Here is my proposed solution, which has added columns. All inferred columns are in CAPS.
--VIEW ROWS TO INSERT
select count(order_id),ship_addrs1,ship_to_zip2
from t_order
where CONSOL_ELIGIBLE = 'Y' and CONSOL_COMPLETED = 'N'
group by ship_addrs1,ship_to_zip2
having count(order_id) > 1
--TEMP TABLE FOR INSERT
declare #tmptable TABLE (total_orders int,ship_addrs1 nvarchar(50),ship_to_zip2 nvarchar(50),CONSOL_ELIGIBLE nvarchar(1))
insert into #tmptable (total_orders, ship_addrs1,ship_to_zip2,CONSOL_ELIGIBLE)
(select count(order_id),ship_addrs1,ship_to_zip2,'N'
from t_order
where CONSOL_ELIGIBLE = 'Y' and CONSOL_COMPLETED = 'N'
group by ship_addrs1,ship_to_zip2
having count(order_id) > 1)
--INSERT FROM TEMP TABLE
insert into ORDER_TABLE (total_orders, ship_addrs1,ship_to_zip2,CONSOL_ELIGIBLE)
(select total_orders, ship_addrs1,ship_to_zip2,CONSOL_ELIGIBLE
from #tmptable)