当我尝试DELETEFROM`TreePaths`WHERE`descendant`IN(SELECT`descendant`FROM`TreePaths`WHERE`ancestor`=0x04);我明白了#1093-Youcan'tspecifytargettable'TreePaths'forupdateinFROMclause我怎样才能让删除生效？更新:表结构:CREATETABLETreePaths(ancestorVARBINARY(16)NOTNULL,descendantVARBINARY(16)NOTNULL,PRIMARYKEY(`ancestor`,`descen