無限分類數據表（三級） 查看所有三級數據（面試題）

SELECT   c.one AS '一級分類' ,    C.`name` AS '二級分類' , D.`name` AS '三級分類' FROM   ( SELECT  A.`name` AS 'one', B.`name` , B.id AS 'id' FROM   tb_item_cat AS A   LEFT JOIN   tb_item_cat AS B  ON  B.parent_i

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