mysql 当两个字段想减时,如果其中一个或两个字段的类型的unsigned无签名类型,如果想减的值小于0则会报错(BIGINT UNSIGNED value is out of range) 测试: select cast(1 as unsigned)-2 select 0-cast(1 as unsigned) 解决办法: 一.修改字段类型 二.使用cast函数转字段为signed类型 select cast(1 as signed)-2…

问题: ERROR 1690 (22003): BIGINT UNSIGNED value is out of range in..的错误 解决方法: 把没被singed的变量临时变更signed去处理. select (cast(col1 as signed)-cast(col2 as signed)) asresult fromTable;…

问题出现在CAST(value AS USIGNED)将字符串转换成数值的过程中,出现这个问题的原因是value对应的数值在BIGINT UNSIGNED 的范围内.可能的情况是value的值太大,超出上限,太小超出下限0. 对于出现浮点数的情况下只能使用CAST(value AS SIGNED),对于出现小于0值的情况就只能先取绝对值再转换成数值了.…

-------------------------------以下是个人根据网上翻阅加个人理解总结结果------------------------------- mysql 表中数据类型和存储过程都有bigint类型和bigint unsigned CREATE TABLE `testbigint` ( `testbigint1` ) ', `testbigint2` ) unsigned ' ) ENGINE=InnoDB DEFAULT CHARSET=utf8; 可以看出,bigint…

在项目中做数据统计的时候需要用到几个字段相减得到想要的值,但是因为字段都是无符号,相减出现mysql 错误 BINGINT UNSIGNED VALUE ..  在c语言中两个无符号相减值为负数,该值却很大 有可能超出int unsign  表示的最大位数. 解决方法:CAST( 字段 as signed) 将无符号转成有符号类型 -- 查询错误订单select orderdetailid, orderid, updatetime, amount, takeamount, refundamoun…

更相减损,要用高精度.... --------------------------------------------------------------- #include<cstdio> #include<cstring> #include<cctype> #include<algorithm>   using namespace std;   const int maxn = 10009;   char S[maxn]; int Power[maxn]…

MySQL中时间不能直接相减,如果日.分.时不同,相减结果是错误的 mysql> select t1,t2,t2-t1 from mytest;   +---------------------+---------------------+-------+   | t1                  | t2                  | t2-t1 |   +---------------------+---------------------+-------+   | 2013-…

asp.net(C#)时间相减 得到天数.小时.分钟.秒差   asp.net(C#)时间相减 得到天数.小时.分钟.秒差   DateTime dtone = Convert.ToDateTime("2007-1-1 05:00:00");         DateTime dtwo = Convert.ToDateTime("2007-1-5 08:00:00");         TimeSpan span = dtone.Subtract(dtwo); //…

asp.net(C#)时间相减 得到天数.小时.分钟.秒差 DateTime dtone = Convert.ToDateTime("2007-1-1 05:00:00"); DateTime dtwo = Convert.ToDateTime("2007-1-5 08:00:00"); TimeSpan span = dtone.Subtract(dtwo); //算法是dtone 减去 dtwo tss.Text = span.Days + "天&qu…

Alice and BobTime Limit: 1 Sec  Memory Limit: 64 MBSubmit: 255  Solved: 43 Description Alice is a beautiful and clever girl. Bob would like to play with Alice. One day, Alice got a very big rectangle and wanted to divide it into small square pieces.…