SELECT hd.id, ar.id as areaId, hd.password, hd.name as username, hd.sex, hd.mobile as phone, hd.card_number as cardNumber, hd.address as address, hd.avatar as avatarUrl, hd.house_number as room, hd.sum_integration as bonus, hd.retrievable_integration as retrievableIntegration, hd.harmful_integration as harmfulIntegration, hd.foodwaste_integration as foodwasteIntegration, hd.use_integration as useIntegration, hd.other_integration as otherIntegration, hd.village as areaName, hd.pid, hd.division_id as divisionId, hd.login_degree as loginDegree, hd.province, hd.city, hd.county, hd.street, hd.qr_code as qrCode, hd.barcode, hd.status, FROM_UNIXTIME(hd.create_time) as createTime, FROM_UNIXTIME(hd.update_time) as updateTime, hd.oldcard, hd.accounts_code as accountsCode, hd.type, hd.token, hd.openid, hd.tong_interal as tongInteral, hd.tong_interal1 as tongInteral1, hd.vali, CONCAT('[',hm.number,']',hm.name) as homeName, FROM_UNIXTIME(hi.create_time) as deliverTime FROM hs_household hd LEFT JOIN hs_management hm ON hd.division_id = hm.id LEFT JOIN hs_area ar -- FORCE INDEX(name) ON ar.id = 391 LEFT JOIN hs_integration_log hi -- FORCE INDEX(create_time ON hi.user_code = hd.id WHERE (hd.province = ar.name OR hd.city = ar.name OR hd.county = ar.name OR hd.street = ar.name) ORDER BY deliverTime DESC LIMIT 1,10这个sql有Using temporary; Using filesort的问题该如何去优化
时间: 2024-04-06 20:32:57 浏览: 184
这个SQL语句中出现"Using temporary"和"Using filesort"的原因是因为在查询过程中使用了ORDER BY子句,MySQL需要对结果进行排序,因此会使用临时表和排序操作。
针对这个问题,可以考虑以下优化措施:
1. 减少排序数据量:如果可以的话,可以尝试减少排序数据量,例如通过使用更精确的查询条件或者限制查询结果数量来减少排序的数据量。
2. 添加索引:在关联字段上添加索引可以提高查询效率,减少排序操作的使用。
3. 使用覆盖索引:如果可以使用覆盖索引,则可以避免MySQL进行排序操作,进而避免使用临时表。
4. 优化服务器配置:通过优化服务器硬件配置和调整MySQL参数,提高服务器的性能。
总之,在优化这个SQL语句时,需要从多个方面综合考虑,根据实际情况选择合适的优化措施。