Filter an XML column in SQL Server-CodePudding

I have an xml type column productsXML in product table

Create Table Product
(
ProductId Int
productsXML XML
)

Insert Into Product Values (1,'<products><productInfo><Item>Car</Item></productInfo><products>'),
                           (2,'<products><productInfo><Item>Train</Item></productInfo><products>'),
                           (3,'<products></products>')

ProductId productsXML
1         <products><productInfo><Item>Car</Item></productInfo><products>
2         <products><productInfo><Item>Train</Item></productInfo><products>
3         <products></products>

I want to find all the rows that have <products></products>

I tried this:

Select *
From products
Where productsxml.exist('/products')=1

This is giving me all the rows that have products tag and understandably so. Is there a way to filter only those rows that have <products></products>

CodePudding user response：

PLease try the following solution.

It is checking that the root products element has no child elements.

SQL

DECLARE @tbl TABLE (ProductId int primary key, productsXML XML);
INSERT INTO @tbl (ProductId, productsXML) VALUES
(1,'<products><productInfo><Item>Car</Item></productInfo></products>'),
(2,'<products><productInfo><Item>Train</Item></productInfo></products>'),
(3,'<products></products>');

SELECT * 
FROM @tbl
Where productsxml.exist('/products[not(*)]')=1

Output

 ----------- -------------- 
| ProductId | productsXML  |
 ----------- -------------- 
|         3 | <products /> |
 ----------- --------------