查询实际执行计划,看走的是那种查询
要根据需求,建立合适的索引
经常需要汇总的,可以建立包含索引
--drop index ix_smssend_created on smssent_1 ;
create index ix_smssend_createdon smssent_1 (created) include(status,co_id,shop_id,channel_id,sms_type,sms_qty)