ORA-54015: Duplicate column expression was specified
文档解释ORA-54015:DuplicatecolumnexpressionwasspecifiedCause:Expressionofthevirtualcolumnbeingadded/createdconflictswithanexisting/previouslyspecifiedfunctionalinde...
ORA-54012: virtual column is referenced in a column expression
文档解释ORA-54012:virtualcolumnisreferencedinacolumnexpressionCause:ThisvirtualcolumnwasreferencedinanexpressionofanothervirtualcolumnAction:Ensurethecolumnexpressi...
ORA-54013: INSERT operation disallowed on virtual columns
文档解释ORA-54013:INSERToperationdisallowedonvirtualcolumnsCause:AttemptedtoinsertvaluesintoavirtualcolumnAction:Re-issuethestatmentwithoutprovidingvaluesforavirtua...
ORA-54011: expression column is not supported for a clustered table
文档解释ORA-54011:expressioncolumnisnotsupportedforaclusteredtableCause:Attempttocreate/alteraclusteredtablewithanexpressioncolumnAction:Thesecolumnsarenotsupported...
ORA-54016: Invalid column expression was specified
文档解释ORA-54016:InvalidcolumnexpressionwasspecifiedCause:Virtualcolumnexpressionisnotavalidarithmeticexpression.itprobablyreferstoanothercolumninthetableAction:Ch...
ORA-54017: UPDATE operation disallowed on virtual columns
文档解释ORA-54017:UPDATEoperationdisallowedonvirtualcolumnsCause:AttemptedtoupdatevaluesofavirtualcolumnAction:Re-issuethestatmentwithoutsettingvaluesforthevirtualc...
ORA-54019: Virtual column expression cannot be changed because it is a partitioning column
文档解释ORA-54019:VirtualcolumnexpressioncannotbechangedbecauseitisapartitioningcolumnCause:Attemptedtomodifytheexpressionofavirtualcolumnthatwasalsoapartitioningco...
ORA-54010: expression column is not supported for a temporary table
文档解释ORA-54010:expressioncolumnisnotsupportedforatemporarytableCause:Attempttocreate/alteratemporarytablewithanexpressioncolumnAction:Thesecolumnsarenotsupported...
HDU - 5401 Persistent Link/cut Tree dp
HDU-5401明显发现这个东西可以递归处理，然后把式子列出来，记忆化搜就可以了。#include<bits/stdc++.h>#defineLLlonglong#defineLDlongdouble#defineullunsignedlonglong#definefifirst#definesesecon...
