我用T-SQL工作，我有一个表，看起来像矩阵（8×8）。 我的目标是让使用数据透视......我已阅读论坛和更多的东西，我设法找到了，但我仍然不能让一个代码，它是矩阵（表）到数组...
ID Bucket B1 B2 B3 B4
5 1 20 21 45 12
6 2 12 18 19 48
7 3 19 78 40 78
8 4 72 34 12 17
因此，所有我需要做的就是让“三维阵列”从该表，并保存行，列和值......是这样的
Row Column Value
1 1 20
1 2 21
1 3 45
1 2 12
etc
etc
etc
4 3 12
4 4 17
没有人有任何想法我怎么能写在T-SQL代码？
PS。 原因，我这样做，是因为我要加倍重视自己的矩阵本身。 所以它更容易繁殖，如果我在数据透视表有它。 谢谢
尝试unpivoting您的数据：
DECLARE @table TABLE (id INT, Bucket INT, B1 INT, B2 INT, B3 INT, B4 INT)
INSERT INTO @table VALUES
(5,1,20,21,45,12),
(6,2,12,18,19,48),
(7,3,19,78,40,78),
(8,4,72,34,12,17)
SELECT rn AS [ROW],
VALUE AS [ColumnNumber],
orders AS [VALUE]
FROM
(
SELECT ROW_NUMBER () OVER (ORDER BY id) AS rn,id, Bucket, B1 [1], B2 [2], B3 [3], B4 [4]
FROM @table
) AS t
UNPIVOT
(
orders
FOR VALUE IN([1], [2],[3],[4])
) AS pvt
检查这个MSDN文档的PIVOT和UNPIVOT的更多细节。
为什么要使用PIVOT？ 你可以获取数据了一个简单的SELECT查询，除非我在这里失去了一些东西？
DECLARE @Matrix TABLE (
Id INT,
Bucket INT,
B1 INT,
B2 INT,
B3 INT,
B4 INT);
INSERT INTO @Matrix VALUES (5, 1, 20, 21, 45, 12);
INSERT INTO @Matrix VALUES (6, 2, 12, 18, 19, 48);
INSERT INTO @Matrix VALUES (7, 3, 19, 78, 40, 78);
INSERT INTO @Matrix VALUES (8, 4, 72, 34, 12, 17);
SELECT
Bucket AS [Row],
1 AS [Column],
B1 AS Value
FROM
@Matrix
UNION ALL
SELECT
Bucket AS [Row],
2 AS [Column],
B2 AS Value
FROM
@Matrix
UNION ALL
SELECT
Bucket AS [Row],
3 AS [Column],
B3 AS Value
FROM
@Matrix
UNION ALL
SELECT
Bucket AS [Row],
4 AS [Column],
B4 AS Value
FROM
@Matrix
ORDER BY
1, 2;
结果：
Row Column Value
1 1 20
1 2 21
1 3 45
1 4 12
2 1 12
2 2 18
2 3 19
2 4 48
3 1 19
3 2 78
3 3 40
3 4 78
4 1 72
4 2 34
4 3 12
4 4 17
