总结: 1.计算某列值(数值or字符串)重复的次数 select 列1,count( 列1 or *) count1 from table1 group by 列1 输出的表为:第一列是保留唯一值的列1,第二列是count1列的统计表. 问:那怎么把其他列信息也都显示出来呢?可以参考:http://www.myexception.cn/oracle-develop/1767413.html 我这里自己做一个总结,进入下一步.2.一张表中增加一列计算某列值重复的次数列,并且把表中其他列也显示出
Coding Contest Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 5968 Accepted Submission(s): 1413 Problem Description A coding contest will be held in this university, in a huge playground. Th