T-SQL利用笛卡尔积累计、累加

--原始数据

select templateid,needitem1Count from db_tank..TS_CardMain

--累计数据

select t1.templateId,t1.needitem1Count,sum(t2.needitem1count) sum_num from db_tank..TS_CardMain t1
cross join db_tank..TS_CardMain t2
where t2.templateid <= t1.templateid
group by t1.templateid,t1.needitem1Count

T-SQL利用笛卡尔积累计、累加

原文：https://www.cnblogs.com/gered/p/9773566.html