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我正在使用此查询来提取products.the产品表有302,716 rows.it需要太多的时间来执行2-3分钟左右。但是,当我删除它的顺序需要更少的时间。通过在mysql中缓慢查询排序
SELECT DISTINCT
product.ProductID,
company.CompanyName
FROM
product
INNER JOIN company
ON company.CompanyID = product.CompanyID
LEFT JOIN company_csv_data
ON company.CompanyID = company_csv_data.CompanyID
LEFT JOIN productcategory
ON product.ProductID = productcategory.ProductID
LEFT JOIN category
ON category.CategoryID = productcategory.CategoryID
LEFT JOIN supplier
ON product.supplier = supplier.id
LEFT JOIN template_vouchers tm
ON product.ProductID = tm.voucher_id
WHERE company.turn_on = 1
AND product.ProductEndDate >= CURRENT_DATE
AND turn_off = 1
GROUP BY product.ProductID
ORDER BY clicks DESC,
product.CodeOpen DESC,
product.Online,
product.EntryDate DESC
LIMIT 0, 15
什么是你的问题? – SebastianH
执行大约3分钟需要太多时间。 –
你试过索引吗? –