SQLSERVER Select rows as columns even if there is no enough rows - sql-server-2008

Question

I have a problem to build a query. After searching on stackoverflow i think i need a crosstab. But i don't know what exactly is this. I think it would be quicker if i show you a simplified version of my problem. I would be glad if you could point me to right direction.
This is example of data:
ColumnIDToGroup Value
-----------------------
1 AAAA
1 BBBB
2 AAAA
2 BBBB
2 CCCC
I need to build a query to get the data in this format:
ColumnIDToGroup Value1 Value2 Value3 Value4 Value5
------------------------------------------------------------
1 AAAA BBBB 'Empty' 'Empty' 'Empty'
2 AAAA BBBB CCCC 'Empty' 'Empty'
As a workarround, I could accept this output, if it is simple to build (when a value is not null, it always have the same size)
ColumnIDToGroup ValueConcat
-------------------------------------
1 AAAABBBB************
2 AAAABBBBCCCC********

Answer 1

SAMPLE TABLE
CREATE TABLE #TEMP(ColumnIDToGroup INT,Value VARCHAR(30))
INSERT INTO #TEMP
SELECT 1, 'AAAA'
UNION ALL
SELECT 1, 'BBBB'
UNION ALL
SELECT 2, 'AAAA'
UNION ALL
SELECT 2, 'BBBB'
UNION ALL
SELECT 2, 'CCCC'
Now select the rows from the table, create a column for Value1, Value2 etc and select the extra columns for Value4,Value5 by UNION all and set text to Empty.
SELECT *,
'Value'+CAST(ROW_NUMBER() OVER(PARTITION BY ColumnIDToGroup ORDER BY VALUE)AS VARCHAR(3)) COL
INTO #NEWTABLE
FROM #TEMP
UNION ALL
SELECT 1,'Empty','Value3'
UNION ALL
SELECT 2,'Empty','Value3'
UNION ALL
SELECT 1,'Empty','Value4'
UNION ALL
SELECT 2,'Empty','Value4'
UNION ALL
SELECT 1,'Empty','Value5'
UNION ALL
SELECT 2,'Empty','Value5'
Now get the columns for pivot
DECLARE #cols NVARCHAR (MAX)
SELECT #cols = COALESCE (#cols + ',[' + COL + ']', '[' + COL + ']')
FROM (SELECT DISTINCT COL FROM #NEWTABLE) PV
ORDER BY COL
Now pivot the query
DECLARE #query NVARCHAR(MAX)
SET #query = 'SELECT * FROM
(
SELECT *
FROM #NEWTABLE
) x
PIVOT
(
MIN(VALUE)
FOR COL IN (' + #cols + ')
) p
ORDER BY ColumnIDToGroup;'
EXEC SP_EXECUTESQL #query
Click here to view the result
If you want in the second specified format, you can use the below query
;WITH CTE AS
(
SELECT *
FROM #TEMP
UNION ALL
SELECT 1,'****'
UNION ALL
SELECT 2,'****'
UNION ALL
SELECT 1,'****'
UNION ALL
SELECT 2,'****'
UNION ALL
SELECT 1,'****'
UNION ALL
SELECT 2,'****'
UNION ALL
SELECT 1,'****'
UNION ALL
SELECT 1,'***'
)
SELECT DISTINCT C2.ColumnIDToGroup,
-- Convert to single row for each ColumnIDToGroup
SUBSTRING(
(SELECT ' ' + CTE.VALUE
FROM CTE
WHERE C2.ColumnIDToGroup=ColumnIDToGroup
ORDER BY
CASE WHEN CTE.VALUE = 'AAAA' THEN 1
WHEN CTE.VALUE = 'BBBB' THEN 2
WHEN CTE.VALUE = 'CCCC' THEN 3
ELSE 4
END
FOR XML PATH('')),2,200000) ValueConcat
FROM CTE C2
Click here to view result