Question

我正在使用MySQL的UNION功能检索表结果。该表基本上包含销售订单

中的订购商品

以下是我使用的查询：

SET @meta_id=0; 
SELECT bsb.ID AS meta_id, bsb.ORDER_ID AS order_item_id, '_product_id' AS meta_key, bsb.PRODUCT_ID AS meta_value, 1 AS origin
FROM b_sale_basket bsb
WHERE bsb.ORDER_ID = 255
UNION
SELECT bsb.ID AS meta_id, bsb.ORDER_ID AS order_item_id, '_qty' AS meta_key, bsb.QUANTITY AS meta_value, 2 AS origin
FROM b_sale_basket bsb
WHERE bsb.ORDER_ID = 255
) sales_order_meta

检索已订购产品上方的第一个查询 order_item_id 255
而检索每个产品的数量数量 已订购

旁注：如果你问为什么我这样查询它们，因为它们都属于同一个表，这是因为我试图像 woocommerce 对其订购的商品做了......

上面查询的输出如下所示：

http://i.stack.imgur.com/qPsjv.png

但是，我希望订购结果，以便在每个订购的产品下方 数量每个产品订购以下他们..

我想要的最终结果，如下所示： http://i.stack.imgur.com/wx6Aw.png

请帮助我......

Answer 1

您可以使用用户定义的变量为每个单独的查询提供排名，因此第一行查询1的排名为1，同样第二行查询的第一行排名为1，然后是2,3等等然后按此行号

订购结果

SELECT bsb.ID AS meta_id, bsb.ORDER_ID AS order_item_id, '_product_id' AS meta_key, bsb.PRODUCT_ID AS meta_value, 1 AS origin
,@r:= @r +1 AS `row`
FROM b_sale_basket bsb,(SELECT @r:=0) t
WHERE bsb.ORDER_ID = 255
UNION
SELECT bsb.ID AS meta_id, bsb.ORDER_ID AS order_item_id, '_qty' AS meta_key, bsb.QUANTITY AS meta_value, 2 AS origin
,@r:= @r +1 AS `row`
FROM b_sale_basket bsb,(SELECT @r:=0) t
WHERE bsb.ORDER_ID = 255
ORDER BY `row`

修改

您还可以尝试ORDER BY order_item_id,meta_key

MySQL - UNION和ORDER / SORT ROWS

1 个答案: