Question

如何根据其变体，variant_options及其来自不同表的sku对表进行分组

我的查询是：

SELECT p.id AS pId, p.name AS pName,
v.name AS vName,
vo.name AS voName,
s.sku, s.price, s.qty
FROM products p
LEFT JOIN variants v ON v.product_id = p.id
LEFT JOIN variant_options vo ON vo.variant_id = v.id
LEFT JOIN skus s ON s.product_id = p.id

它像这样显示

table:
pId | pName   | vName | voName | sku  | price | qty

1   | adidas  | size  | 42     | AD42 | 100   | 10
1   | adidas  | size  | 43     | AD42 | 100   | 10
1   | adidas  | size  | 42     | AD43 | 100   | 10
1   | adidas  | size  | 43     | AD43 | 100   | 10

我希望我的桌子成为：

table:
pId | pName   | vName | voName | sku  | price | qty

1   | adidas  | size  | 42     | AD42 | 100   | 10
                      | 43     | AD43 | 100   | 10

Answer 1

根据需要添加GROUP BY。

SELECT p.id AS pId, p.name AS pName,
v.name AS vName,
vo.name AS voName,
s.sku, s.price, s.qty
FROM products p
LEFT JOIN variants v ON v.product_id = p.id
LEFT JOIN variant_options vo ON vo.variant_id = v.id
LEFT JOIN skus s ON s.product_id = p.id
GROUP BY v.name, vo.name, s.product_id

但是有时您可能只选择其中一个GROUP BY以减小粒度。例如：

GROUP BY s.product_id

如何使用mysql按产品ID对结果进行分组

1 个答案: