添加索引:ALTER TABLE `u_sku` ADD INDEX `ix_sku_id_num_iid` (`num_iid`, `sku_id`);
子段順序和where後的順序必須一致
添加索引:ALTER TABLE `u_sku` ADD INDEX `ix_sku_id_num_iid` (`num_iid`, `sku_id`);
子段順序和where後的順序必須一致
https://www.bilibili.com/video/BV1k8411575T/?vd_source=d68ed178f151e80fea1e02efd205802c