Mysql – UPDATE statement using GROUP_CONCAT()

I’m attempting to create a single query that UPDDATES another table where the SUBQUERY/ DERIVED-QUERY uses two functions, GROUP BY and GROUP_CONCAT().

I’m able to get my desired output if I utilize a intermediate temporary table to store the "grouped/ concated" data and then push that "re-organized" data to the destination table.

I have to run 2 separate queries–one that populates the temp table with the "organized" data in its fields and then another UPDATE that pushes the "organized" data from the temp table to the final destination table.

I use implicit-explicit casting when I use GROUP_CONCAT(CONCAT(quantity,'')).

CREATE TABLE `test_tbl` (
            `equipment_num` varchar(20),
            `item_id` varchar(40),
            `quantity` decimal(10,2),
            `po_num` varchar(20)
)

INSERT INTO `test_tbl`
(`equipment_num`, `item_id`, `quantity`, `po_num`) VALUES
(TRHU8399302, '70-8491', '5.00', 'PO10813-Air'),
(TRHU8399302, '40-21-72194', '22.00', '53841'),
(TRHU8399302, '741-PremBundle-CK', '130.00', 'NECTAR-PMBUNDLE-2022'),
(TRHU8399302, '741-GWPBundle-KG', '650.00', 'NECTAR2021MH185-Fort'),
(TRHU6669420, '01-DGCOOL250FJ', '76000.00', '4467'),
(TRHU6669420, '20-2649', '450.00', 'PO9994'),
(TRHU6669420, 'PFL-PC-GRY-KG', '80.00', '1020'),
(TRHU6669420, '844067025947', '120.00', 'Cmax 2 15 22'),
(TRHU5614145, 'Classic Lounge Chair Walnut leg- A XH301', '372.00', 'P295'),
(TRHU5614145, '40-21-72194', '22.00', '53837'),
(TRHU5614145, 'MAR-PLW-55K-BX', '2313.00', 'SF220914R-CA'),
(TRHU5614145, 'OPCP-BH1-L', '150.00', 'PO-00000429B'),
(TRHU5367889, 'NL1000WHT', '3240.00', 'PO1002050'),
(TRHU4692842, '1300828', '500.00', '4500342008'),
(TRHU4560701, 'TSFP-HB2-T', '630.00', 'PO-00000485A'),
(TRHU4319443, 'BGS21ASFD', '20.00', 'PO10456-1'),
(TRHU4317564, 'CSMN-AM1-X', '1000.00', 'PO-00000446'),
(TRHU4249449, '4312970', '3240.00', '4550735164'),
(TRHU4238260, '741-GWPBundle-TW', '170.00', 'NECTAR2022MH241'),
(TRHU3335270, '1301291', '60000.00', '4500330599'),
(TRHU3070607, '36082233', '150.00', '11199460'),
(TLLU8519560, 'BGM03AWFX', '360.00', 'PO10181A'),
(TLLU8519560, '10-1067', '9120.00', 'PO10396'),
(TLLU8519560, 'LUNA-KP-SS', '8704.00', '4782'),
(TLLU5819760, 'GS-1319', '10000.00', '62719'),
(TLLU5819760, '2020124775', '340.00', '3483'),
(TLLU5389611, '1049243', '63200.00', '4500343723'),
(TLLU4920852, '40-21-72194', '22.00', '53839'),
(TRHU3335270, '4312904', '1050.00', '4550694829'),
(TLLU4540955, '062-06-4580', '86.00', '1002529'),
(TRHU3335270, 'BGM03AWFK', '1000.00', 'PO9912'),
(TLLU4196942, 'Classic Dining Chair,Walnut Legs, SF XH1', '3290.00', 'P279'),
(TLLU4196942, 'BGM61AWFF', '852.00', 'PO10365');

I’m trying to update another table based off this information but with GROUP_CONCAT().

GROUP_CONCAT(item_id),
GROUP_CONCAT(quantity),
GROUP_CONCAT(po_num) -- grouping by equipment_num field.

I UPDATE another table with the GROUPED by equipment_num with and the Group_concats for the fields described above. I was able to do what I desired with a intermediary TEMPORARY table. Since what I need is a list of the quantities, I do GROUP_CONCAT(CONCAT(quantity,'')):

DROP TABLE __tmp__;
CREATE TABLE __tmp__
SELECT equipment_num, GROUP_CONCAT( item_id ), GROUP_CONCAT(CONCAT(  quantity ,  '' ) ), GROUP_CONCAT( po_num )
FROM  `test_tbl`
GROUP BY equipment_num

Finally I pull the information in the format I desire to the destination table:

UPDATE `dest_tbl` AS ms
INNER JOIN `__tmp__` AS isn
ON ( ms.equipment_num = isn.equipment_num )
SET ms.item_id = isn.item_id,
ms.piece_count = isn.quantity,
ms.pieces_detail = isn.po_num 

What is a single query that generates a derived query that does the group_concat part and then pushes that derived query result to the final destination table?

I’m trying to AVOID using the temp table.
I was thinking:

UPDATE dest
INNER JOIN(
    SELECT src.equipment_num, GROUP_CONCAT(src.item_id) as item_id, 
        GROUP_CONCAT(CONCAT(src.quantity)) as quantity, 
        GROUP_CONCAT(src.po_num) as po_num
    FROM  `item_shipped_ns` as src
    INNER JOIN milestone_test_20221019 as dest
    ON(src.equipment_num=dest.equipment_num)
    WHERE src.importer_id='123456'
    GROUP BY src.equipment_num
    ) as tmp
ON (src.equipment_num=tmp.equipment_num)
SET 
dest.item_num=tmp.item_id,
dest.piece_count=tmp.quantity,
dest.pieces_detail=tmp.po_num;

#1146 – Table ‘fgcloud.dest’ doesn’t exist

I’m having issues with the table aliases. The table that should be updated is the milestone_test_20221019–it is declared as dest, yet it cannot find it. The source table to get the information and to aggregate before updating milestone_test_20221019 is item_shipped_ns and that tmp table is the derived/sub-query table alias.