在将 XML 数据存储到 SQL 的过程中，在 SQL 中使用 OPENXML 查询 XML 文件

Question

我正在使用 IRS -900 税务文件 https://s3.amazonaws.com/irs-form-990/200931393493000150_public.xml 使用 SQL OPENXML 创建包含所有元素、属性及其关联值的单个 table。我建立查询只是为了看看我是否能得到如下所示的结果。但我只得到一个空的 table.

我还尝试使用在线实用程序创建 xpath 引用或文档的 XML 树来识别这个长 XML 文件中的元素和属性。

请推荐任何简单的工具来轻松列出所有元素和属性，因为我认为 xpath 参考是问题所在。

这是我的代码

--在 sql 服务器中为 xml 文档创建了一个 table --示例 XML: https://s3.amazonaws.com/irs-form-990/200931393493000150_public.xml

USE [IRS-900]
GO

CREATE TABLE [200931393493000150_public] (
    Id INT IDENTITY PRIMARY KEY
    ,XMLData XML
    ,LoadedDateTime DATETIME
    )

INSERT INTO [200931393493000150_public] (
    XMLData
    ,LoadedDateTime
    )
SELECT CONVERT(XML, BulkColumn) AS BulkColumn
    ,GETDATE()
FROM OPENROWSET(BULK 'C:\Users0931393493000150_public.xml', SINGLE_BLOB) AS x;

--select * from [dbo].[200931393493000150_public]
DECLARE @x XML -- to load the binary file to a readable xml document in sql 

SELECT @x = p
FROM
    -- to load the document I used openrowset
    openrowset(BULK 'C:\Users0931393493000150_public.xml', single_blob) AS [200931393493000150_public](p)

DECLARE @hdoc INT -- out put parameter 

EXEC sp_xml_preparedocument @hDoc OUTPUT
    ,@x

SELECT *
--into table x - will load the result into sql table on the fly 
-- xpath to the element , 1 is for attributes and 2 for elements 
--from  openxml(@hdoc, '//*',1)
--from  openxml(@hdoc, '/root//*',1)
--from  openxml(@hdoc, '/root//*',1)
--with specifies columns to be retreived
FROM openxml(@hdoc, '/root/returnheader/Filer/USAddress', 2)
    -- flag 1 for attributes 
    -- flag 2 for elements 
    WITH (
        EIN CHAR(10) '/../../@EIN'
        ,-- to refer the xpath for the attribute 
        AddressLine1 VARCHAR(50)
        ,AddressLine2 INT
        ,City VARCHAR(50)
        ,STATE VARCHAR(50)
        ,ZIPCode CHAR(5)
        )

--catch release 
EXEC sp_xml_removedocument @hDoc
GO

-- I have got empty table with the corresponding 6 columns

Answer 1

Microsoft 专有 OPENXML 及其伙伴 sp_xml_preparedocument 和 sp_xml_removedocument 大部分保留只是为了与过时的 SQL Server 2000 向后兼容。

从 SQL Server 2005 开始，最好使用 XQuery 方法 .nodes() 和 .value() 来实现您的需要。

SQL

DECLARE @targetTable TABLE 
(
    ID INT IDENTITY PRIMARY KEY,  
    EIN CHAR(10), 
    AddressLine1 VARCHAR(50),
    AddressLine2 VARCHAR(50),
    City VARCHAR(50),
    State CHAR(2),
    ZIPCode CHAR(5)
);

-- directly from the XML file as a virtual DB table on the file system
;WITH XMLNAMESPACES (DEFAULT 'http://www.irs.gov/efile')
, rs (xmldata) AS
(
   SELECT TRY_CAST(BulkColumn AS XML) AS BulkColumn 
   FROM OPENROWSET(BULK 'e:\Temp0931393493000150_public.xml', SINGLE_BLOB) AS x
)
INSERT INTO @targetTable
SELECT c.value('(EIN/text())[1]', 'CHAR(10)') AS EIN
   , c.value('(USAddress/AddressLine1/text())[1]','VARCHAR(50)') AS AddressLine1
   , c.value('(USAddress/AddressLine2/text())[1]','VARCHAR(50)') AS AddressLine2
   , c.value('(USAddress/City/text())[1]','VARCHAR(100)') AS City
   , c.value('(USAddress/State/text())[1]','CHAR(2)') AS State
   , c.value('(USAddress/ZIPCode/text())[1]','CHAR(5)') AS ZIPCode
FROM rs AS tbl
   CROSS APPLY tbl.xmldata.nodes('/Return/ReturnHeader/Filer') AS t(c);

-- test
SELECT * FROM @targetTable;

输出

+----+------------+-------------------------------------+--------------+------------+-------+---------+
| ID |    EIN     |            AddressLine1             | AddressLine2 |    City    | State | ZIPCode |
+----+------------+-------------------------------------+--------------+------------+-------+---------+
|  1 | 541599550  | c/o Piascik Assoc PC 4470 Cox Rd No |          250 | Glen Allen | VA    |   23060 |
+----+------------+-------------------------------------+--------------+------------+-------+---------+

在将 XML 数据存储到 SQL 的过程中，在 SQL 中使用 OPENXML 查询 XML 文件

Querying XML file with OPENXML in SQL in the process of storing XML data to SQL

xml

sql-server

xpath

openxml

xml-parsing