[英]Mysql Many-to-many (AND Where) select
我有此數據庫設置:
制品
標簽
product_tag
如果我的數據庫中有此記錄
在此示例中,如何查詢具有tag_id 1和2的產品(必須由具有tag_id 1和2的產品組成):“產品A”和“產品C”
SELECT *
FROM products
WHERE id IN (
SELECT product_id
FROM product_tag
GROUP BY product_id
HAVING GROUP_CONCAT(tag_id) = '1,2'
)
用這個
SELECT P.id
FROM products P
INNER JOIN products_tags PT ON PT.product_id = P.id
WHERE PT.tag_id IN (1,2)
GROUP BY P.id
HAVING COUNT(PT.*) = 2
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