如何從SQL中的動態樞軸創建固定表？

Question

我正在嘗試根據下面的動態數據透視表的結果創建一個新表。 查詢本身可以正常工作。

DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX);
SET @columns = N'';
SELECT @columns += N', p.' + QUOTENAME(COMMON_NAME)
FROM (SELECT p.COMMON_NAME FROM eBird AS p
GROUP BY p.COMMON_NAME) AS x;
SET @sql = N'
SELECT SAMP_EVENT_ID, ' + STUFF(@columns, 1, 2, '') + '
FROM
(SELECT SAMP_EVENT_ID, COMMON_NAME, SUM(IIF(OBS_COUNT IS NULL, 0, 1)) AS       
Pres
FROM eBird GROUP BY SAMP_EVENT_ID, COMMON_NAME) AS j
PIVOT
(SUM(Pres) FOR COMMON_NAME IN ('
+ STUFF(REPLACE(@columns, ', p.[', ',['), 1, 1, '')  + ')) AS p;';
PRINT @sql;
EXEC sp_executesql @sql; 

我已經嘗試過典型的
SELECT * INTO newtable FROM（子查詢）但這沒有用。 我收到錯誤消息“關鍵字'DECLARE'附近的消息156，級別15，狀態1，行416錯誤語法。'）'附近的消息102，級別15，狀態1，行432錯誤的語法。”。

我也嘗試過這樣修改此部分：SELECT @columns + = N'，p。' + QUOTENAME（COMMON_NAME）INTO sp_pivot FROM（從eBird選擇p.COMMON_NAME，從pBird BY p.COMMON_NAME選擇AS）x；

但是，我得到這個錯誤：
消息194，級別15，狀態1，第419行SELECT INTO語句不能包含將值分配給變量的SELECT語句。

我花了很多時間試圖通過查看以前的問題來解決這個問題，希望能對您有所幫助。 謝謝。

Answer 1

以下內容適用於MS SQL 2014。

 DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX);
SET @columns = N'';
SELECT @columns += N', p.' + QUOTENAME(COMMON_NAME)
FROM (SELECT p.COMMON_NAME FROM eBird AS p
GROUP BY p.COMMON_NAME) AS x;
SET @sql = N'
SELECT SAMP_EVENT_ID, ' + STUFF(@columns, 1, 2, '') + ' into NewTable
FROM
(SELECT SAMP_EVENT_ID, COMMON_NAME, SUM(IIF(OBS_COUNT IS NULL, 0, 1)) AS       
Pres
FROM eBird GROUP BY SAMP_EVENT_ID, COMMON_NAME) AS j
PIVOT
(SUM(Pres) FOR COMMON_NAME IN ('
+ STUFF(REPLACE(@columns, ', p.[', ',['), 1, 1, '')  + ')) AS p;';
PRINT @sql;
EXEC sp_executesql @sql; 

適用於2008 R2的版本：

DECLARE @columns NVARCHAR(MAX), @sql NVARCHAR(MAX);
SET @columns = N'';
SELECT @columns += N', p.' + QUOTENAME(COMMON_NAME)
FROM (SELECT p.COMMON_NAME FROM eBird AS p
GROUP BY p.COMMON_NAME) AS x;
SET @sql = N'
SELECT SAMP_EVENT_ID, ' + STUFF(@columns, 1, 2, '') + '  into NewTable2 
FROM
(SELECT SAMP_EVENT_ID, COMMON_NAME, SUM(case when OBS_COUNT is null then  0 else 1 end) AS       
Pres
FROM eBird GROUP BY SAMP_EVENT_ID, COMMON_NAME) AS j
PIVOT
(SUM(Pres) FOR COMMON_NAME IN ('
+ STUFF(REPLACE(@columns, ', p.[', ',['), 1, 1, '')  + ')) AS p;';
PRINT @sql;
EXEC sp_executesql @sql;