[MSSQL] 재귀 SQL 호출

WITH TT AS (
    SELECT 10000 AS DEPTCD, '회사' AS DEPTNAME, NULL AS PARENTDEPTCD, 1 AS DEPTH
    UNION ALL
    SELECT 11000 AS DEPTCD, '경영지원실' AS DEPTNAME, 10000 AS PARENTDEPTCD, 2 AS DEPTH
    UNION ALL
    SELECT 12000 AS DEPTCD, '영업지원실' AS DEPTNAME, 10000 AS PARENTDEPTCD, 2 AS DEPTH
    UNION ALL
    SELECT 12100 AS DEPTCD, '영업팀' AS DEPTNAME, 12000 AS PARENTDEPTCD, 3 AS DEPTH
    UNION ALL
    SELECT 12200 AS DEPTCD, '영업팀' AS DEPTNAME, 12000 AS PARENTDEPTCD, 3 AS DEPTH
    UNION ALL
    SELECT 11100 AS DEPTCD, '경제팀' AS DEPTNAME, 11000 AS PARENTDEPTCD, 3 AS DEPTH
    UNION ALL
    SELECT 11200 AS DEPTCD, '경영팀' AS DEPTNAME, 11000 AS PARENTDEPTCD, 3 AS DEPTH
    UNION ALL
    SELECT 11210 AS DEPTCD, '총무파트' AS DEPTNAME, 11200 AS PARENTDEPTCD, 4 AS DEPTH
    UNION ALL
    SELECT 11220 AS DEPTCD, '인사파트' AS DEPTNAME, 11200 AS PARENTDEPTCD, 4 AS DEPTH
    UNION ALL
    SELECT 11110 AS DEPTCD, '경제전략1팀' AS DEPTNAME, 11100 AS PARENTDEPTCD, 4 AS DEPTH
    UNION ALL
    SELECT 11120 AS DEPTCD, '경제전략2팀' AS DEPTNAME, 11100 AS PARENTDEPTCD, 4 AS DEPTH
), CTE AS (
    SELECT DEPTCD
        ,  DEPTNAME
        ,  PARENTDEPTCD
        ,  CONVERT(NVARCHAR(300), DEPTNAME) AS FULLPATH
        ,  CONVERT(NVARCHAR(300), DEPTNAME) AS REVERSEFULLPATH
    FROM TT
    WHERE PARENTDEPTCD IS NULL
    UNION ALL
    SELECT B.DEPTCD
        ,  B.DEPTNAME
        ,  B.PARENTDEPTCD
        ,  CONVERT(NVARCHAR(300), CONCAT(C.FULLPATH, ' > ', B.DEPTNAME)) AS FULLPATH
        ,  CONVERT(NVARCHAR(300), CONCAT(B.DEPTNAME, ' > ', C.REVERSEFULLPATH)) AS REVERSEFULLPATH
    FROM TT B, CTE C
    WHERE B.PARENTDEPTCD = C.DEPTCD
)
SELECT * 
FROM CTE