摘要: 1 import java.io.BufferedReader; 2 import java.io.File; 3 import java.io.FileReader; 4 import java.io.IOException; 5 6 public class ReadFromFile { 7 8 9 10 public static ... 阅读全文
posted @ 2017-02-09 09:33 菜鸟流 阅读(2527) 评论(0) 推荐(0)
摘要: 多表关联时本身有一条数据,但是视图查出重复数据用distinct可以解决。 如: 视图如下 SELECT DISTINCT t1.station_id as station_id, t1.tick_sn as tick_sn, t1.order_id as order_id, t2.station_ 阅读全文
posted @ 2017-01-22 16:48 菜鸟流 阅读(2786) 评论(0) 推荐(0)