标签：style blog http color strong ar 数据 2014 art
一、无法INNER JOIN
SELECT T1.Party_ID, T1.R, T1.F, T1.M, T2.lab FROM ( SELECT Party_ID, CAST(ROUND((CAST(MAX_R AS DECIMAL(20,4))-CAST(R AS DECIMAL(20,4)))/ (CAST(MAX_R AS DECIMAL(20,4))-CAST(MIN_R AS DECIMAL(20,4)))*100,1) AS DECIMAL(20,4)) AS R, CAST(ROUND((CAST(F AS DECIMAL(20,4))-CAST(MIN_F AS DECIMAL(20,4)))/ (CAST(MAX_F AS DECIMAL(20,4))-CAST(MIN_F AS DECIMAL(20,4)))*100,1) AS DECIMAL(20,4)) AS F, CAST(ROUND((CAST(M AS DECIMAL(20,4))-CAST(MIN_M AS DECIMAL(20,4)))/ (CAST(MAX_M AS DECIMAL(20,4))-CAST(MIN_M AS DECIMAL(20,4)))*100,1) AS DECIMAL(20,4)) AS M FROM ( SELECT t1.Party_ID, t1.R, t1.F, t1.M FROM PT_TEMP_P.PTY_ANALYSIS t1 INNER JOIN PT_TEMP_P.PTY_LANE t2 ON t1.Party_Id = t2.Party_Id WHERE t1.F>0 AND t1.M<100000 AND t1.M>0 ) A , ( SELECT MAX(R) AS MAX_R, MIN(R) AS MIN_R, MAX(F) AS MAX_F, MIN(F) AS MIN_F, MAX(M) AS MAX_M, MIN(M) AS MIN_M FROM PT_TEMP_P.PTY_ANALYSIS WHERE F>0 AND M>0 AND M<100000 ) B ) T1 , ( SELECT R,F,M,lab FROM PT_TEMP_P.RFM_LABEL_TRANS ) T2 WHERE T1.R=T2.R AND T1.F = T2.F AND T1.M=T2.M
目标阐述：
表PT_TEMP_P.PTY_ANALYSIS：原始数据表, 包含的变量R、F、M、ID_Nbr；
表PT_TEMP_P.RFM_LABEL_TRANS：为从外部导入teradata数据库中的表. 变量为R、F、M、lab, 该表中的R、F、M为”原始数据“标准化后的结果, 另有一列lab表示一个新的变量.
表 PT_TEMP_P.PTY_LANE 中的ID_Nbr 为原始数据表中 ID_Nbr 的子集.
首先INNER JOIN 表PT_TEMP_P.PTY_ANALYSIS 和 表PT_TEMP_P.PTY_LANE, 得到表PT_TEMP_P.PTY_LANE中的ID_Nbr对应的R、F、M值,
目标：需要通过INNER JOIN 找到表PT_TEMP_P.PTY_LANE中的ID_Nbr对应的lab值.
二、数据检查
SELECT R,F,M,lab FROM PT_TEMP_P.RFM_LABEL_TRANS WHERE (R=79.4 AND F=13.1AND M=17.4)OR (R=96.7AND F=2.3AND M=3.4)OR (R=88.2AND F=3.9AND M=9)OR (R=96.4AND F=13.9AND M=27.6)...... /*其中, where条件中的数据来自表T1 */
利用Excel快速生成文本：
检查结果：表PT_TEMP_P.RFM_LABEL_TRANS 中能够找到表T1中的数据，两个表本应该可以INNER JOIN.
三、解决办法
/*先建表, 将表T1存入某个被定义的表中*/ CREATE MULTISET TABLE Pt_temp_p.p01 ( Party_ID varchar(255), R decimal(20,4), F decimal(20,4), M decimal(20,4) ); INSERT INTO PT_TEMP_P.p01 ( Party_ID, R, F, M ) SELECT Party_ID, CAST(ROUND((CAST(MAX_R AS DECIMAL(20,4))-CAST(R AS DECIMAL(20,4)))/ (CAST(MAX_R AS DECIMAL(20,4))-CAST(MIN_R AS DECIMAL(20,4)))*100,1) AS DECIMAL(20,4)) AS R, CAST(ROUND((CAST(F AS DECIMAL(20,4))-CAST(MIN_F AS DECIMAL(20,4)))/ (CAST(MAX_F AS DECIMAL(20,4))-CAST(MIN_F AS DECIMAL(20,4)))*100,1) AS DECIMAL(20,4)) AS F, CAST(ROUND((CAST(M AS DECIMAL(20,4))-CAST(MIN_M AS DECIMAL(20,4)))/ (CAST(MAX_M AS DECIMAL(20,4))-CAST(MIN_M AS DECIMAL(20,4)))*100,1) AS DECIMAL(20,4)) AS M FROM ( SELECT t1.Party_ID, t1.R, t1.F, t1.M FROM PT_TEMP_P.PTY_ANALYSIS t1 INNER JOIN PT_TEMP_P.PTY_LANE t2 ON t1.Party_Id = t2.Party_Id WHERE t1.F>0 AND t1.M<100000 AND t1.M>50 ) A , ( SELECT MAX(R) AS MAX_R, MIN(R) AS MIN_R, MAX(F) AS MAX_F, MIN(F) AS MIN_F, MAX(M) AS MAX_M, MIN(M) AS MIN_M FROM PT_TEMP_P.PTY_ANALYSIS WHERE AND F>0 AND M>50 AND M<100000 ) B /*再INNER JOIN 新建的表与 从外部导入的表*/ SELECT t1.Party_ID, t1.R,t1.F,t1.M ,t2.labFROM pt_temp_p.p01 t1 INNER JOIN PT_TEMP_P.RFM_LABEL_TRANS t2 ON t1.R=t2.R AND t1.F =t2.F AND t1.M=t2.M
无法INNER JOIN 的原因：可能是数据类型不匹配.
但即使在where条件中将匹配变量通过cast... as...成相同的数据类型，仍然不能成功.Teradata 从外部导入的数据表的 INNER JOIN 问题
标签：style blog http color strong ar 数据 2014 art
原文地址：http://www.cnblogs.com/dream-flower/p/3955030.html
