SQL查询成本核算，聚合视图更快？

I have a table, Sheet1$ that contains 616 records. I have another table, Rates$ that contains 47880 records. Rates contains a response rate for a given record in the sheet for 90 days from a mailing date. Within all 90 days of a records Rates relation the total response is ALWAYS 1 (100%)I have a table, Sheet1$ that contains 616 recor