今天写sql语句时,相对字符串类型的数字进行排序,怎么做呢? 需要先转换成数字再进行排序 1.直接用加法 字符串+0 eg: select * from orders order by (mark+0) desc 2.使用函数 CAST(value as type); CONVERT(value, type); 注: 这里的type可以为: 浮点数 : DECIMAL 整数 : SIGNED 无符号整数 : UNSIGNED eg: select * from orders order by
速算24点 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2562 Accepted Submission(s): 606 Problem Description 速算24点相信绝大多数人都玩过.就是随机给你四张牌,包括A(1),2,3,4,5,6,7,8,9,10,J(11),Q(12),K(13).要求只用'+','-','*
http://wo13145219.iteye.com/blog/2022667 http://json2csharp.chahuo.com/ using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using
/** * Hex格式数据转换成十六进制字符串 * @param src */ public void bytesToHexString(byte[] by){ StringBuilder stringBuilder = new StringBuilder(""); for (int i = 0; i < by.length; i++) { int in = by[i] & 0xFF; String str= Integer.toHexString(in); if (st