SELECT
*
FROM
(
SELECT
product_goods.sku AS sku,
yoursister.*
FROM
product_goods
LEFT JOIN (
SELECT
eoo.*,
pccc. NAME AS cate_one_name
FROM
(
SELECT
eo.*,
pcc. NAME AS cate_two_name,
pcc.pid AS cate_two_pid
FROM
(
SELECT
a.*, pc. NAME AS product_cate_name,
pb. NAME AS product_brand_name,
sc. NAME AS seller_cate_name,
sr.seller_name AS seller,
pc.pid AS cate_pid,
pc.`name` AS cate_three_name
FROM
(
SELECT
id,
name1,
product_cate_id,
seller_id,
cost_price,
mall_pc_price,
mal_mobile_price,
product_stock,
actual_sales,
is_top,
create_time,
up_time,
state,
product_brand_id,
product.id AS pct_id,
seller_cate_id
FROM
`product`
WHERE
`state` IN (6)
ORDER BY
id DESC
) AS a
LEFT JOIN product_cate pc ON pc.id = a.product_cate_id
LEFT JOIN product_brand pb ON pb.id = a.product_brand_id
LEFT JOIN seller_cate sc ON sc.id = a.seller_cate_id
LEFT JOIN seller sr ON sr.id = a.seller_id
) eo
LEFT JOIN product_cate pcc ON pcc.id = eo.cate_pid
) eoo
LEFT JOIN product_cate pccc ON pccc.id = eoo.cate_two_pid
) AS yoursister ON product_goods.product_id = yoursister.pct_id
) AS xxxx
WHERE
xxxx.name1 IS NOT NULL
上面这条sql巨慢无比，截图如下（根本查不出来结果，因为太慢了，我等不到结果）：
做视图优化：
CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`%` SQL SECURITY DEFINER VIEW `view_product` AS SELECT
product_goods.sku,
pccc.`NAME` AS cate_one_name,
pcc.`NAME` AS cate_two_name,
pc.`NAME` AS product_cate_name,
pb.`NAME` AS product_brand_name,
sc.`NAME` AS seller_cate_name,
sr.seller_name AS seller,
pc.`name` AS cate_three_name,
product.id,
product.name1,
product.seller_id,
product.cost_price,
product.mall_pc_price,
product.mal_mobile_price,
product.product_stock,
product.actual_sales,
product.is_top,
product.create_time,
product.up_time,
product.state,
product.product_brand_id,
product.id AS pct_id,
product.seller_cate_id
FROM
product_goods
LEFT JOIN product ON product_goods.product_id = product.id
LEFT JOIN product_cate pc ON pc.id = product.product_cate_id
LEFT JOIN product_cate pcc ON pcc.id = pc.pid
LEFT JOIN product_cate pccc ON pccc.id = pcc.pid
LEFT JOIN product_brand pb ON pb.id = product.product_brand_id
LEFT JOIN seller_cate sc ON sc.id = product.seller_cate_id
LEFT JOIN seller sr ON sr.id = product.seller_id出结果了，截图如下：
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