I have this table:
SKU | BrandId | Barcode |
---|---|---|
1 | 1 | 123 |
1 | 1 | 987 |
1 | 1 | 852 |
1 | 2 | 951 |
1 | 2 | 753 |
2 | 1 | 926 |
2 | 1 | 364 |
2 | 2 | 854 |
2 | 2 | 256 |
2 | 2 | 351 |
2 | 2 | 157 |
2 | 3 | 976 |
I need this query result format:
SKU | BrandId | Barcode1 | Barcode2 | Barcode3 | Barcode4 |
---|---|---|---|---|---|
1 | 1 | 123 | 987 | 852 | |
1 | 2 | 951 | 753 | ||
2 | 1 | 926 | 364 | ||
2 | 2 | 854 | 256 | 351 | 157 |
2 | 3 | 976 |
The barcode should be dynamic because there is unkown Barcodes for every SKU+BrandId row
the concept is to build a dynamic pivot query as follow
CREATE TABLE #t (sku nvarchar(5), brandid nvarchar(5), barcode nvarchar(50) )
truncate table #t
INSERT INTO #t VALUES
(1,1,150),
(1,1,140),
(1,1,111),
(1,2,1234),
(1,2,145),
(2,1,345),
(2,1,532),
(2,2,875),
(2,2,1237),
(3,1,566)
select *,'Barcode'+CONVERT (nvarchar(50),ROW_NUMBER()over(partition by sku, brandid order by sku)) rn from #t
DECLARE @colName AS NVARCHAR(MAX), @pivotQ AS NVARCHAR(max)
SELECT @colName = ISNULL(@colName + ',', '') + QUOTENAME(rn)
FROM (select DISTINCT 'Barcode'+CONVERT (nvarchar(50),ROW_NUMBER()over(partition by sku, brandid order by sku)) rn from #t
) AS Labels ORDER BY rn
SET @pivotQ = N'
SELECT sku, brandid, '+@colName+'
FROM
(
SELECT sku, brandid , barcode , ''Barcode''+CONVERT (nvarchar(50),ROW_NUMBER()over(partition by sku, brandid order by sku)) rn
FROM #t
) AS SourceTable
PIVOT
(
MAX(barcode)
FOR rn IN ('+@colName+')
) AS PivotTable;
'
EXECUTE sp_executesql @pivotQ
I strongly suggest you do not go down the dynamic query route, as it can be difficult to code, and vulnerable to SQL injection.
Instead just hard-code the maximum possible Barcode
columns in a normal conditional aggregation.
SELECT
t.Sku,
t.BrandId,
Barcode1 = MAX(CASE WHEN t.rn = 1 THEN t.Barcode END),
Barcode2 = MAX(CASE WHEN t.rn = 2 THEN t.Barcode END),
Barcode3 = MAX(CASE WHEN t.rn = 3 THEN t.Barcode END),
Barcode4 = MAX(CASE WHEN t.rn = 4 THEN t.Barcode END),
Barcode5 = MAX(CASE WHEN t.rn = 5 THEN t.Barcode END),
Barcode6 = MAX(CASE WHEN t.rn = 6 THEN t.Barcode END),
Barcode7 = MAX(CASE WHEN t.rn = 7 THEN t.Barcode END),
Barcode8 = MAX(CASE WHEN t.rn = 8 THEN t.Barcode END),
Barcode9 = MAX(CASE WHEN t.rn = 9 THEN t.Barcode END),
Barcode10 = MAX(CASE WHEN t.rn = 10 THEN t.Barcode END)
FROM
(
SELECT *,
rn = ROW_NUMBER() OVER (PARTITION BY t.Sku, t.BrandId ORDER BY t.Barcode)
FROM YourTable t
) t
GROUP BY
t.Sku,
t.BrandId;
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