php遞歸無限極分類 sql無限極分類,遞歸查詢?
sql無限極分類,遞歸查詢?with tb1(id,pid,name)as ( select id,pid,name from 表名 a where pid=0 inner join select i
sql無限極分類,遞歸查詢?
with tb1(id,pid,name)as ( select id,pid,name from 表名 a where pid=0 inner join select id,pid,name from 表名 b on a.id=b.pid ) select * from tb1