Flattening the hierarchial data

Question

Hi,
I have the data in this format
ID        NAME         ParentID
CV1      CV1NAME      CV
CVX1    CVX1NAME    CV1
CVXX1  CVXX1NAME  CVX1
CV2      CV2NAME     CV
CVX2    CVX2NAME    CV2
CVXX2  CVXX2NAME  CVX2
How can i flatten this data into this format
CVID    CVNAME     CVXID   CVXNAME   CVXXID   CVXXNAME
cv1        cv1name  cvx1        cvx1name    cvxx1     cvxx1name
cv2        cv2name  cvx2        cvx2name    cvxx2     cvxx2name

Answer 1

DECLARE @table TABLE (ID varchar(10), NAME varchar(20), ParentID varchar(10))
INSERT INTO @table (ID, NAME, ParentID) VALUES
('CV1', 'CV1NAME', 'CV'),
('CVX1', 'CVX1NAME', 'CV1'),
('CVXX1', 'CVXX1NAME', 'CVX1'),
('CV2', 'CV2NAME', 'CV'),
('CVX2', 'CVX2NAME', 'CV2'),
('CVXX2', 'CVXX2NAME', 'CVX2')
SELECT
t0.ID AS CVID,
t0.NAME AS CVNAME,
t1.ID AS CVXID,
t1.NAME AS CVXNAME,
t2.ID AS CVXXID,
t2.NAME AS CVXXNAME
FROM
SELECT ID, NAME, RIGHT(ID, 1) AS Num
FROM @table
WHERE ID LIKE 'CV[1-9]'
) AS t0
FULL JOIN
SELECT ID, NAME, RIGHT(ID, 1) AS Num
FROM @table
WHERE ID LIKE 'CVX[1-9]'
) AS t1 ON t1.Num = t0.Num
FULL JOIN
SELECT ID, NAME, RIGHT(ID, 1) AS Num
FROM @table
WHERE ID LIKE 'CVXX[1-9]'
) AS t2 ON t2.Num = t0.Num
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