用於來自不同表格的XML路徑。

我有以下腳本可以爲一個表生成XML。我需要稍微修改它，以便在一個XML查詢中從3個不同的表中提取它。我不知道如何修改它，以便它在1個查詢中完成。我應該創建一個存儲過程：用於來自不同表格的XML路徑。

SELECT 
CAST(EmployeeNumber AS varchar(9)) AS [employee/id], 
LastName AS [name/last], 
FirstName AS [name/first], 
'Employee' AS [persontype], 
email AS email 
FROM dbo.Employees AS sd 
WHERE (IsActive = 'Y') FOR XML PATH('employees')

其他表：

dbo.Contractors

該查詢略有不同：

SELECT 
CAST(EmployeeNumber AS varchar(9)) AS [employee/id], 
LastName AS [name/last], 
FirstName AS [name/first], 
'Contractor' AS [persontype], 
email AS email 
FROM dbo.Employees AS sd 
WHERE (IsActive = 'Y') FOR XML PATH('employees')

最後一個是：

dbo.Interns

SELECT 
CAST(EmployeeNumber AS varchar(9)) AS [employee/id], 
LastName AS [name/last], 
FirstName AS [name/first], 
'Intern' AS [persontype], 
email AS email 
FROM dbo.Employees AS sd 
WHERE (IsActive = 'Y') FOR XML PATH('employees')

只有改變場就在這裏

來源

2013-05-06 user1366606

希望這將幫助：

select * from (
SELECT 
CAST(EmployeeNumber AS varchar(9)) AS [employee/id], 
LastName AS [name/last], 
FirstName AS [name/first], 
'Employee' AS [persontype], 
email AS email 
FROM dbo.Employees AS sd 
WHERE (IsActive = 'Y') 
union 
SELECT 
CAST(EmployeeNumber AS varchar(9)) AS [employee/id], 
LastName AS [name/last], 
FirstName AS [name/first], 
'Contractor' AS [persontype], 
email AS email 
FROM dbo.Employees AS sd 
WHERE (IsActive = 'Y' 
union 
SELECT 
CAST(EmployeeNumber AS varchar(9)) AS [employee/id], 
LastName AS [name/last], 
FirstName AS [name/first], 
'Intern' AS [persontype], 
email AS email 
FROM dbo.Employees AS sd 
WHERE (IsActive = 'Y')) employees 
FOR XML PATH('employees')

來源

2013-05-06 14:52:16 Pavel

+1：我建議使用'有更好的表現UNION ALL'（'[persontype]'是每個UNION分支不同，所以應該沒有重複反正）和一些縮進以提高可讀性。 – RBarryYoung 2013-05-06 15:04:53

是的，你是對的性能，但這些查詢不能有重複，因爲第五行有明確的價值 – Pavel 2013-05-06 16:22:13

我認爲這將工作，我打算從不同的表，但沒有指定查詢中的表......這是星期一畢竟:) – user1366606 2013-05-06 17:24:49

線5的任何理由，你爲什麼不能UNION這三個疑問？這將把3個單獨的查詢視爲一個數據集。

來源

2013-05-06 14:45:42

用於來自不同表格的XML路徑。

回答

相關問題