--树形sql查询
WITH TREE AS( --创建一个虚拟表
SELECT * FROM tableName --指定需要查询的表
WHERE id = '' -- 指定父节点条件
UNION ALL --联合查询
SELECT tableName.* FROM tableName,TREE
WHERE TREE.id = tableName.parentId
)
SELECT * FROM TREE;
--树形sql查询
WITH TREE AS( --创建一个虚拟表
SELECT * FROM tableName --指定需要查询的表
WHERE id = '' -- 指定父节点条件
UNION ALL --联合查询
SELECT tableName.* FROM tableName,TREE
WHERE TREE.id = tableName.parentId
)
SELECT * FROM TREE;