mysql - 子句中的 COUNT HAVING + GROUP BY

Question

我正在尝试构建一个查询，该查询将仅捕获数据库中有超过 1 个制造商条形码的 SKU(产品)。我正在尝试使用变量，但它不起作用

Table 1 (wms_inventory)
SKU1
SKU2
SKU3

_

Table 2 (ims_manufacturer_barcode)
SKU1 MB1
SKU1 MB2
SKU2 MB3
SKU3 MB4
SKU3 MB5
SKU3 MB6

_

Result expected
SKU1 | 2
SKU3 | 3

-> no SKU2 in the results because there is only 1 Manufacturer Barcode.

_

SELECT
i.fk_current_warehouse AS `Warehouse`,
i.sku AS `SKU`,
@var := COUNT(DISTINCT b.manufacturer_barcode) AS `Number of different Manufacturer Barcode`
FROM wms_inventory i
LEFT JOIN ims_manufacturer_barcode b ON i.sku = b.sku
HAVING @var > 1
GROUP BY i.sku
;

_

上述查询引发以下错误

SQL Error (1064): You have an error in your SQL syntax;
check the manual that corresponds to your MariaDB server version
for the right syntax to use near 'GROUP BY i.sku' at line 8

Answer 1

下面的查询将帮助您...

  SELECT B.COL1, COUNT(DISTINCT B.COL2) AS CNT FROM TABLE2 B
GROUP BY B.COL1 HAVING COUNT(DISTINCT B.COL2) >1