1 查找表中多余的重复记录,重复记录是根据单个字段1 select * from TB_MAT_BasicData1
2 where MATNR in ( select MATNR from TB_MAT_BasicData1 group by MATNR having count(MATNR)>1) 2.表需要删除重复的记录(重复记录保留1条)&…
参考 - P503
public class RunThreads implements Runnable {public static void main (String[] args) {RunThreads runner new RunThreads();Thread alpha new Thread(runner);Thread beta new Thread(runner);alpha.setName("Alpha thread");beta.setName(&qu…
int Partition(int a[], int low, int high)
{int x a[high];//将输入数组的最后一个数作为主元,用它来对数组进行划分int i low - 1;//i是最后一个小于主元的数的下标for (int j low; j < high; j)//遍历下标由low到high-1的数{if (a[j] < x)//如果数小于…
Shiro是一个非常不错的权限框架,它提供了登录和权限验证功能 1.创建数据库脚本
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS 0;
-- ----------------------------
-- Table structure for module
-- ----------------------------
DROP TABLE IF EXISTS module;
C…