[请原谅格式错误-第一次在这里发帖，我认真地尝试做对了]
从功能上讲，我只是想在其“喜欢”商品的分组中找到价格最低的商品。例如——有很多葡萄酒，但我需要找到价格最低的 750ml RED 和 WHITE；有很多奶酪，但我需要找到价格最低的 8 盎司 CHEDDAR 和 FETA；等等
我发现的所有解决方案都说在我的代码中做同样的事情。 我的“自我加入”一定有问题。选择查询自身运行不到 10 秒，嵌套选择也是如此。但是，当我尝试加入他们时，我的查询挂起并且永远不会完成。 必须有某种方法可以成功地进行此连接。
我有数百万行数据要从中提取。每行都是一个独特的项目/商店组合。我的嵌套选择试图找到非“名牌”商品的最低价格；在“like”项目中找到最低价格，由以下列确定：store_name、category、subcategory、class、package_desc2、unit_name、chk（在我的查询中，“chk”由两个不同列的结果确定）。
这为我提供了上述列的所有组合的不同列表，每个组合的价格最低。我正在尝试将其加入非“名称”品牌商品，以查看我们在嵌套选择中找到的低价商品。任何帮助表示赞赏！我已经在这几天了，无法弄清楚。
这里的 SQL：
SELECT b.zone_name,
b.store_name,
b.family,
b.category,
b.subcategory,
b.class,
b.team,
b.subteam,
b.pos_dept,
b.brand_name,
b.item_description,
b.upc,
b.package_desc1 pkg,
b.package_desc2 sz,
b.unit_name,
CASE
WHEN b.good = 'good'
OR b.how_good = 1 THEN 'YES'
ELSE 'NO'
END AS chk,
b.eff_pricetype,
b.eff_price low_price,
b.cd dollar_sales,
b.cu unit_sales,
b.cgm margin_dollars,
b.cgm / Nullif(b.cd, 0) AS margin_pct,
b.deleted_item,
b.discontinue_item,
b.not_available,
b.remove_item,
b.recall_flag,
CASE
WHEN
SUM(
Isnull(b.deleted_item, 0) + Isnull(b.discontinue_item, 0) + Isnull(b.not_available, 0) + Isnull(b.remove_item, 0) + Isnull(b.recall_flag, 0)) = 0 THEN
'NO'
ELSE 'YES'
END AS istatus,
d.low
FROM mytable b
INNER JOIN(SELECT c.store_name,
c.category,
c.subcategory,
c.class,
c.package_desc2,
c.unit_name,
CASE
WHEN c.good = 'good'
OR c.how_good = 1 THEN 'YES'
ELSE 'NO'
END AS chk,
MIN(c.eff_price) low
FROM mytable c
WHERE store_name = 'some store'
AND brand_name NOT LIKE '%name%'
AND weeks = 'Last 12 weeks'
AND ( eff_pricetype = 'REG'
OR eff_pricetype = 'EDV'
OR eff_pricetype = 'GBC'
OR eff_pricetype = 'CMP'
OR eff_pricetype = 'LIN'
OR eff_pricetype = 'FRZ'
OR eff_pricetype = 'GBB'
OR eff_pricetype = 'EDLP'
OR eff_pricetype = 'GBN'
OR eff_pricetype = 'GBR'
OR eff_pricetype = 'MKT'
OR eff_pricetype = 'COMP'
OR eff_pricetype = 'R'
OR eff_pricetype = 'COM' )
AND ( family = 'carrots'
OR family = 'tomatoes'
OR family = 'Cheese'
OR family = 'Coffee'
OR family = 'peppers'
OR family = 'milk'
OR family = 'oil'
OR family = 'season'
OR family = 'Housewares'
OR family = 'paper'
OR family = 'Meat'
OR family = 'soup'
OR family = 'nuts'
OR family = 'pizza'
OR family = 'potatoes'
OR family = 'Seafood'
OR family = 'beer'
OR family = 'vitamins'
OR family = 'Tea'
OR family = 'Wine'
OR family = 'beans' )
GROUP BY c.store_name,
c.category,
c.subcategory,
c.class,
c.package_desc2,
c.unit_name,
c.good,
c.how_good
HAVING MIN(c.eff_price) > 0) AS d
ON b.store_name = d.store_name
AND b.category = d.category
AND b.subcategory = d.subcategory
AND b.class = d.class
AND b.package_desc2 = d.package_desc2
AND b.unit_name = d.unit_name
AND CASE
WHEN b.good = 'good'
OR b.how_good = 1 THEN 'YES'
ELSE 'NO'
END = d.chk
AND b.eff_price = d.low
WHERE store_name = 'some store'
AND brand_name NOT LIKE '%name%'
AND weeks = 'Last 12 weeks'
AND ( eff_pricetype = 'REG'
OR eff_pricetype = 'EDV'
OR eff_pricetype = 'GBC'
OR eff_pricetype = 'CMP'
OR eff_pricetype = 'LIN'
OR eff_pricetype = 'FRZ'
OR eff_pricetype = 'GBB'
OR eff_pricetype = 'EDLP'
OR eff_pricetype = 'GBN'
OR eff_pricetype = 'GBR'
OR eff_pricetype = 'MKT'
OR eff_pricetype = 'COMP'
OR eff_pricetype = 'R'
OR eff_pricetype = 'COM' )
AND ( family = 'carrots'
OR family = 'tomatoes'
OR family = 'Cheese'
OR family = 'Coffee'
OR family = 'peppers'
OR family = 'milk'
OR family = 'oil'
OR family = 'season'
OR family = 'Housewares'
OR family = 'paper'
OR family = 'Meat'
OR family = 'soup'
OR family = 'nuts'
OR family = 'pizza'
OR family = 'potatoes'
OR family = 'Seafood'
OR family = 'beer'
OR family = 'vitamins'
OR family = 'Tea'
OR family = 'Wine'
OR family = 'beans' )
GROUP BY b.zone_name,
b.store_name,
b.family,
b.category,
b.subcategory,
b.class,
b.team,
b.subteam,
b.pos_dept,
b.brand_name,
b.item_description,
b.upc,
b.package_desc1,
b.package_desc2,
b.unit_name,
d.org,
b.eff_pricetype,
b.eff_price,
b.cd,
b.cu,
b.cgm,
b.deleted_item,
b.discontinue_item,
b.not_available,
b.remove_item,
b.recall_flag,
d.low,
b.good,
b.how_good