摘要:Sum聚合函数对DateTime数据类型字段进行求和统计求同一时间字段时间总和declare @t table(TimeLen char(8))insert into @t select '08:32:33'insert into @t select '00:00:06'insert into @t select '00:00:30'insert into @t select '00:00:13'... 阅读全文
posted @ 2008-10-17 10:19 harry.guo 阅读 (81) 评论 (0) 编辑