我正在尝试编写一个SQL来显示分层模式。我的第一次尝试很好地处理了单个数据,因为下面的SQL是有效的。SELECT CONCAT (LPAD (' ',LEVEL*3-3), M.MODULE) MODULE,M.ABBREVIATION,M.PARENT START WITH M.PARENT IS NULL
ORDER SIBLINGS BY M.MODULE; 此
但是我得到了这个错误: error: Error: You have an error in your SQL syntax; check the manual that corresponds tothe right syntax to use near ' 'In 1972, a popular student in Yomiyama North Middle School\'s class 3-code: 'ER_PARSE_ERROR', sqlState: