MYSQL根据节点向上和向下查询所有节点
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WITH cte
AS
(
SELECT * ,UnitID AS level FROM UnitTable WHERE UnitID=2
UNION ALL
SELECT g.*,level+1 FROM UnitTable g INNER JOIN cte
ON g.FatherID=cte.UnitID
)
SELECT * FROM cte
WITH cte
AS
(
SELECT *,0 as level FROM UnitTable WHERE FatherID=0
UNION ALL
SELECT g.*,level+1 FROM UnitTable g INNER JOIN cte
ON g.FatherID=cte.UnitID
)
SELECT * FROM cte
WITH cte
AS
(
SELECT * ,UnitID AS level FROM UnitTable WHERE UnitID=2
UNION ALL
SELECT g.*,g.UnitID AS level FROM UnitTable g INNER JOIN cte ON g.UnitId=cte.FatherID
)
SELECT * FROM cte
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