Round(X,Y) 将X进行小数位四舍五入取值 若省掉Y，将四舍五入为整数
Select Round( K1,2) as K1 From tableName
对时间进行规范化输出
strftime(‘%Y-%m-%d %H:%M:%S‘,TimeCreate) as TimeCreate
插入或更新时
TimeCreate -------- + ",‘" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff") + "‘"
原文：http://www.cnblogs.com/LongHuaiYu/p/5908958.html