WITH DepartmentTree AS (
    SELECT       
        Id, 
        Code,
        Name,
        UpDepartmentId,
        1 as Level
    FROM       
        SaintEir_Department
    WHERE Id  = 1
    UNION ALL
    SELECT 
        e.Id, 
        e.Code,
        e.Name,
        e.UpDepartmentId,
        o.Level + 1 as Level
    FROM 
        SaintEir_Department e
        INNER JOIN DepartmentTree o 
            ON o.Id = e.UpDepartmentId
)
SELECT * FROM DepartmentTree;