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)生存.---Geovin Du(涂聚文)