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这是查询：

SELECT tbl_product.id, tbl_productspecification.id AS specificationId,
            tbl_product.ProductId, tbl_seller.CompanyName, tbl_product.ProductName, tbl_product.Description, mst_Categories.id AS 'Category',
            tbl_productspecification.RetailPrice, tbl_productspecification.SalePrice,
            tbl_product.image, tbl_productspecification.Discount, tbl_product.EndTime, tbl_product.Seller_Id
            FROM tbl_product
            LEFT OUTER JOIN tbl_seller ON tbl_seller.SelId = tbl_product.Seller_Id
            LEFT OUTER JOIN mst_Categories ON (mst_Categories.id = tbl_product.Category OR mst_Categories.id = tbl_product.SubCategory)
            LEFT OUTER JOIN tbl_productspecification ON tbl_productspecification.ProductId = tbl_product.ProductId
            LEFT OUTER JOIN mst_image ON mst_image.Product = tbl_product.ProductId
            LEFT OUTER JOIN tbl_dealinterest ON tbl_dealinterest.ProductId = tbl_product.ProductId
            where tbl_product.Active='y' and tbl_product.StartTime <= '".date("Y-m-d H:i:s")."' and tbl_product.EndTime>'".date("Y-m-d")." 06:00:00'
            ".$subquery." ".$groupby;

该tbl_dealinterest表有几个字段：

[BuyerId] [ProductId] [Active]

我需要过滤掉tbl_dealinterest匹配中的任何记录[BuyerId] [ProductId]并且[Active]不等于n

我尝试了一些东西，但并未列出所有产品tbl_dealinterest。只有当有人选择一个选项时，它才会被输入。

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1 回答 1

1

这应该过滤掉 tbl_dealinterest 中的任何匹配记录。这是假设 tbl_dealinterest.BuyerId 如果存在记录，则永远不会为 NULL。

如果没有匹配，tbl_dealinterest 表的左连接将为 tbl_dealinterest 表中的所有字段返回 NULL 值。where 子句中的“tbl_dealinterest.BuyerId IS NULL”将过滤掉匹配项。

SELECT tbl_product.id, tbl_productspecification.id AS specificationId,
            tbl_product.ProductId, tbl_seller.CompanyName, tbl_product.ProductName, tbl_product.Description, mst_Categories.id AS 'Category',
            tbl_productspecification.RetailPrice, tbl_productspecification.SalePrice,
            tbl_product.image, tbl_productspecification.Discount, tbl_product.EndTime, tbl_product.Seller_Id
            FROM tbl_product
            LEFT OUTER JOIN tbl_seller ON tbl_seller.SelId = tbl_product.Seller_Id
            LEFT OUTER JOIN mst_Categories ON (mst_Categories.id = tbl_product.Category OR mst_Categories.id = tbl_product.SubCategory)
            LEFT OUTER JOIN tbl_productspecification ON tbl_productspecification.ProductId = tbl_product.ProductId
            LEFT OUTER JOIN mst_image ON mst_image.Product = tbl_product.ProductId
            LEFT OUTER JOIN tbl_dealinterest ON tbl_dealinterest.BuyerId = tbl_product.BuyerId AND tbl_dealinterest.ProductId = tbl_product.ProductId AND tbl_dealinterest.active <> 'n'
            where tbl_product.Active='y' and tbl_product.StartTime <= '".date("Y-m-d H:i:s")."' and tbl_product.EndTime>'".date("Y-m-d")." 06:00:00'
            AND tbl_dealinterest.BuyerId IS NULL
            ".$subquery." ".$groupby;
于 2012-11-06T20:04:49.220 回答