zoukankan      html  css  js  c++  java
  • sql distinct

    ---沒有去除重復的記錄
    select distinct ContractLaborEmployeeUidKey,ContractLaborEndDate from ContractLaborList order by ContractLaborEndDate desc
    
    
    
    select  * from ContractLaborList order by ContractLaborEmployeeUidKey
    
    ---沒有去除重復的記錄
    select * from ContractLaborList where ContractLaborEmployeeUidKey in (select distinct ContractLaborEmployeeUidKey from ContractLaborList)
    order by ContractLaborEndDate desc
    
    --去除ContractLaborEmployeeUidKey重復的記錄
    select * from ContractLaborList where ContractLaborEndDate in( SELECT MAX(ContractLaborEndDate) AS ContractLaborEndDate FROM ContractLaborList GROUP BY ContractLaborEmployeeUidKey) --重复行只查询一条
    order by ContractLaborEndDate desc
    
    ---去除ContractLaborEmployeeUidKey重復的記錄
    select * from ContractLaborList e 
    WHERE e.ContractLaborEndDate = (SELECT max(x.ContractLaborEndDate) FROM ContractLaborList x WHERE x.ContractLaborEmployeeUidKey = e.ContractLaborEmployeeUidKey);
    
    SELECT * FROM View_ContractLaborList
    
    --取出ContractLaborEmployeeUidKey重復的值
    SELECT  * FROM ContractLaborList s2
    WHERE 1 < (SELECT COUNT(*)  FROM ContractLaborList s1 WHERE s1.ContractLaborEmployeeUidKey = s2.ContractLaborEmployeeUidKey)
    
    哲学管理(学)人生, 文学艺术生活, 自动(计算机学)物理(学)工作, 生物(学)化学逆境, 历史(学)测绘(学)时间, 经济(学)数学金钱(理财), 心理(学)医学情绪, 诗词美容情感, 美学建筑(学)家园, 解构建构(分析)整合学习, 智商情商(IQ、EQ)运筹(学)成功.---Geovin Du(涂聚文)
  • 相关阅读:
    正则表达式学习(转自csdn过客)
    javascript学习笔记(二)--继承
    sql 中print 输出变量值
    禅语摘录
    dTree的分析和二次开发,ajax加载dtree节点(下)(转)
    UpdatePanel的各种情况
    Cocos2dx制作帧动画
    Cocos2dx中文显示乱码
    Struts2 过滤器与拦截器
    创业不是纸上谈兵,把你的商业计划扔进垃圾桶吧
  • 原文地址:https://www.cnblogs.com/geovindu/p/2748586.html
Copyright © 2011-2022 走看看