ORA-36997：(XSRELGID14) For variable or relation grouping ids, a level relation is needed when a level order valueset is specified.
错误码
错误描述：(XSRELGID14) For variable or relation grouping ids, a level relation is needed when a level order valueset is specified.
错误原因：no level relation exists with level order valueset.
解决方法：provide the level relation.
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