-2
错误的搜索查询正在导致我们的网站崩溃。编写计数每个子类别的人,然后将它们加在一起以获得主要类别的总数。 对于分页接下来,最后,页面,然后用JOIN/INNER JOIN(该页面的所有产品)编写查询。它创造了太多的步骤,从而放慢了一切,直到它超时。帮帮我!慢搜索查询 - 错误的编码,(左连接)
查询摘要:
SELECT COUNT(DISTINCT node.nid) AS cnt FROM
content_type_product cp
LEFT JOIN node node ON node.nid = cp.nid
LEFT JOIN uc_products uc_products ON node.nid = uc_products.nid
LEFT JOIN users users ON users.uid = node.uid
LEFT JOIN files ON files.fid = cp.field_product_image_1_value
LEFT JOIN content_type_product_tags ct ON ct.field_product_product_id_value = cp.nid
WHERE
(
node.status <> N
)
AND
(
ct.field_product_tag_id_value = N
)
AND
(
cp.field_deleted_value <> N
)
AND
(
cp.field_stock_level_value > N
)
AND EXISTS
(
SELECT scp.nid FROM content_type_store scp
LEFT JOIN node snode ON snode.nid = scp.nid
LEFT JOIN users susers ON susers.uid = snode.uid
WHERE susers.name = users.name
AND scp.field_shop_activated_value = 'S'
AND scp.field_shop_suspended_value = 'S')
ORDER BY cp.field_product_last_changed_value DESC;
查询样品:
SELECT count(Distinct node.nid) as cnt
FROM content_type_product cp
LEFT JOIN node node ON node.nid = cp.nid
LEFT JOIN uc_products uc_products ON node.nid = uc_products.nid
LEFT JOIN users users ON users.uid = node.uid
LEFT JOIN files ON files.fid = cp.field_product_image_1_value
LEFT JOIN content_type_product_tags ct ON ct.field_product_product_id_value = cp.nid
WHERE
(
node.status <> 0
)
AND
(
ct.field_product_tag_id_value = 478
)
AND
(
cp.field_deleted_value <> 1
)
AND
(
cp.field_stock_level_value > 0
)
AND EXISTS
(
SELECT scp.nid FROM content_type_store scp
LEFT JOIN node snode on snode.nid = scp.nid
LEFT JOIN users susers on susers.uid = snode.uid
WHERE susers.name = users.name
AND scp.field_shop_activated_value = '1'
AND scp.field_shop_suspended_value = '0'
)
ORDER BY cp.field_product_last_changed_value DESC
我建议从一张纸上的流程图开始。首先写下你需要在页面上显示的数据。 然后写下需要采取的相关表格。 然后制作流程图,以便了解在此基础上采取何种措施并随后生成查询。 当你采取这种方法时,你可以做一个复杂的查询,而不会失去跟踪什么。 – Tschallacka
如果您正确格式化查询以便更易读,您将更容易获得帮助。 – hannebaumsaway
作为一点额外的提示,你的'order by'似乎是无用的;您正在使用分析功能。 – Ben