Retrieve XML data using XPath : XML query « XML « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » XML » XML query 
24. 4. 4. Retrieve XML data using XPath
3>
4CREATE TABLE dbo.ProductBilling
5(ProductBillingID int IDENTITY(1,1PRIMARY KEY,
6> ProductBillingXML XML NOT NULL)
7> GO
1>
2INSERT dbo.ProductBilling(ProductBillingXML)
3> VALUES ('<ProductBilling Billingnumber="1" customerid="22" orderdate="7/1/2005">
4~ <OrderItems>
5~ <Item id="22" qty="1" name="SQL"/>
6~ <Item id="24" qty="1" name="T-SQL"/>
7~ </OrderItems>
8~ </ProductBilling>')
9>
10INSERT dbo.ProductBilling
11(ProductBillingXML)
12> VALUES ('<ProductBilling Billingnumber="1" customerid="40" orderdate="7/11/2005">
13~ <OrderItems>
14~ <Item id="11" qty="1" name="Notes"/>
15~ </OrderItems>
16~ </ProductBilling>')
17>
18INSERT dbo.ProductBilling
19(ProductBillingXML)
20> VALUES ('<ProductBilling Billingnumber="1" customerid="9" orderdate="7/22/2005">
21~ <OrderItems>
22~ <Item id="11" qty="1" name="SQL Notes"/>
23~ <Item id="24" qty="1" name="T-SQL Notes"/>
24~ </OrderItems>
25~ </ProductBilling>')
26>
27> set quoted_identifier on
28>
29SELECT ProductBillingID
30FROM dbo.ProductBilling
31WHERE ProductBillingXML.exist
32('/ProductBilling/OrderItems/Item[@id=11]') 1
33> GO

(rows affected)

(rows affected)

(rows affected)
ProductBillingID
----------------
               2
               3

(rows affected)
1>
2> set quoted_identifier off
3>
4> drop table dbo.ProductBilling
5> GO
24. 4. XML query
24. 4. 1. XML query on XML column
24. 4. 2. XPath query on XML
24. 4. 3. SELECT @ProductBillingXML.query('/ProductBilling/OrderItems/Item')
24. 4. 4. Retrieve XML data using XPath
24. 4. 5. XPath search and element index
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