摘要：向下递归查询 WITH CTE AS ( -- 锚点：LT-W-00000001 SELECT bom_no,prd_no,zc_no,id_no,0 AS Level -- 层级：0 表示起始 FROM tf_bom WHERE bom_no = 'LT-W-00000001->' UNION A 阅读全文