A表A1字段取B表的B1字段的值,条件是A表的DATA字段日期在B表的S_DATA与E_DATA的时间类
update a set a1=b.b1 from a,b where a.data between b.s_data and b.e_data
update a set a1=b.b1 from a,b where a.data between b.s_data and b.e_data
转载于:https://www.cnblogs.com/KevinDai/archive/2013/02/22/2922003.html