#Correlation

ORA-25241: cannot change correlation ID from string to string without FIRST_MESSAGE option

文档解释ORA-25241:cannotchangecorrelationIDfromstringtostringwithoutFIRST_MESSAGEoptionCause:AnattemptwasmadetochangethecorrelationIDwhileusingtheNEXT_MESSAGEorNEXT...

ORA-32582: table function with left correlation to a table cannot also be left outer-joined to the table

文档解释ORA-32582:tablefunctionwithleftcorrelationtoatablecannotalsobeleftouter-joinedtothetableCause:AtablefunctionT2containsareferencetoatableT1.T2isalsoleftouter...

皮尔逊相关系数(Pearson Correlation Coefficient,Pearson's r)

Pearson'sr,称为皮尔逊相关系数(Pearsoncorrelationcoefficient),用来反映两个随机变量之间的线性相关程度。 用于总体(population)时记作ρ (rho)(populationcorrelationcoefficient):给定两个随机变量X,Y,...