SQL SERVER 递归查询

查找所有父结点：

WITH    CTE_Area

AS ( SELECT   *

FROM     Common.Area

WHERE    AreaCode = ‘30A‘

UNION ALL

SELECT   b.*

FROM     CTE_Area a,

Common.Area b

WHERE    a.ParentCode = b.AreaCode

)

SELECT  *

FROM    CTE_Area;

查找所有子结点：

WITH    CTE_Area

AS ( SELECT   *

FROM     Common.Area

WHERE    AreaCode = ‘1‘

UNION ALL

SELECT   b.*

FROM     CTE_Area a,

Common.Area b

WHERE    a.AreaCode = b.ParentCode

)

SELECT  *

FROM    CTE_Area;