[英]Pivoting for two tables using sql server
在這里,我的數據庫中有兩個表,名稱分別為Topic和Soltion。
我的表格如下所示。
主題表:
Topic
A
B
C
D
第二張桌子
Solution
AA
BB
CC
DD
EE
FF
GG
HH
II
JJ
KK
LL
MM
NN
OO
PP
這兩個是我的表格,我想像下面一樣旋轉這兩個表格
皮維特表
A B C D
AA EE HH MM
BB FF JJ NN
CC GG KK OO
DD LL
請幫忙...
因此,這里沒有邏輯,所以我創建了自己的:D(只是有興趣使它自動化)。
我的邏輯是,我將解決方案中的第一個主題“ A”放在第4行,第二個“ B”放在下一個3行,第三個在第四行,依此類推。 將解決方案分為4行和3行。
請查看示例中的注釋:
-----------
--created some data to test
-----------
DECLARE @Topic TABLE (topic CHAR(1))
INSERT INTO @Topic SELECT 'A'
INSERT INTO @Topic SELECT 'B'
INSERT INTO @Topic SELECT 'C'
INSERT INTO @Topic SELECT 'D'
DECLARE @Solution TABLE (solution CHAR(2))
INSERT INTO @Solution SELECT 'AA'
INSERT INTO @Solution SELECT 'BB'
INSERT INTO @Solution SELECT 'CC'
INSERT INTO @Solution SELECT 'DD'
INSERT INTO @Solution SELECT 'EE'
INSERT INTO @Solution SELECT 'FF'
INSERT INTO @Solution SELECT 'GG'
INSERT INTO @Solution SELECT 'HH'
INSERT INTO @Solution SELECT 'II'
INSERT INTO @Solution SELECT 'JJ'
INSERT INTO @Solution SELECT 'KK'
INSERT INTO @Solution SELECT 'LL'
INSERT INTO @Solution SELECT 'MM'
INSERT INTO @Solution SELECT 'NN'
INSERT INTO @Solution SELECT 'OO'
INSERT INTO @Solution SELECT 'PP'
--DROP TABLE #topicCTE
-----------
--created table which shows what IDs from solution table must get topic
-----------
;WITH topicCTE As (
SELECT topic, ROW_NUMBER() OVER (ORDER BY topic) AS ID
FROM @Topic
)
SELECT topic, ID
, CASE WHEN ID % 2 = 1 THEN (((ID / 2)+1) *4 + (ID / 2) *3)-4 ELSE (((ID / 2)) *4 + (ID / 2) *3)-3 END AS RowsMINID
, CASE WHEN ID % 2 = 1 THEN (((ID / 2)+1) *4 + (ID / 2) *3) ELSE (((ID / 2)) *4 + (ID / 2) *3) END AS RowsMAXID
INTO #topicCTE
FROM topicCTE
/*Example Result
topic ID RowsMINID RowsMAXID
A 1 0 4
B 2 4 7
C 3 7 11
D 4 11 14
*/
--DROP TABLE #FinalData
-----------
--attached topics to solution
-----------
;WITH SolutionCTE AS (
SELECT Solution, ROW_NUMBER() OVER (ORDER BY Solution) AS ID
FROM @Solution
)
SELECT S.Solution, T2.Topic, ROW_NUMBER() OVER (PARTITION BY T2.Topic ORDER BY Solution) AS RowsID
INTO #FinalData
FROM SolutionCTE AS S
CROSS APPLY (
SELECT *
FROM #topicCTE AS T
WHERE T.RowsMINID < S.ID AND T.RowsMAXID >= S.ID
) AS T2
/*Example result
Solution Topic RowsID
AA A 1
BB A 2
CC A 3
DD A 4
EE B 1
FF B 2
GG B 3
*/
-----------
--get columns for pivot from @topic table
-----------
DECLARE @columns VARCHAR(1000) = STUFF((SELECT ',[' + topic + ']' FROM @Topic FOR XML PATH('')), 1, 1, '')
-----------
--create pivot sql command
-----------
DECLARE @sql NVARCHAR(MAX) = N'
SELECT ' + @columns + '
FROM #FinalData
PIVOT
(
MAX(Solution)
FOR [Topic] IN (' + @columns + ')
) AS p';
EXECUTE sp_executesql @sql
/*FINAL Results
A B C D
AA EE HH LL
BB FF II MM
CC GG JJ NN
DD KK
*/
我想這不是什么要求,但是很好地解決了一些問題:D
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