从多个上传的图像中获取单个图像

Question

I have three tables

• Products
• Featured Products
• Images

Each Product has multiple images but for homepage I want to display only one image for featured products.

This is the query I wrote but for products with 2 images it displays same product twice with different image. Any help?

mysqli_query($conn, "SELECT * FROM products a , featured_product b, image c WHERE b.p_id = a.product_id AND a.product_id = c.product_id ");

Answer 1

尝试使用GROUP BY a.product_id