How to filter an XML field on multiple conditions

Question

I have a table as such:

CREATE TABLE MyTable(
    Id [int] IDENTITY(1,1) NOT NULL,
    XmlField xml NULL,
    /// Some other fields
)

The XML field contains an XML representation of a C# Dictionary<int, string>. E.g :

<dictionary>
    <item>
        <key><int>1</int></key>
        <value><string>Web</string></value>
    </item>
    <item>
        <key><int>2</int></key>
        <value><string>Email</string></value>
    </item>
    // more item
</dictionary>

What I want to do is select all rows where XmlField contains (key = 1 with value = 'Web') and also contains (key = 2 with value = 'Email').

So far I have only managed to filter rows for 1 unique key/value match:

SELECT TableId, XmlField FROM MyTable
CROSS APPLY XmlField.nodes('/dictionary/item') x(fields)
WHERE (x.fields.value('(key/int/text())[1]', 'int') = 1 
AND x.fields.value('(value/string/text())[1]', 'varchar(MAX)') = 'Web')

If I add AND (x.fields.value('(key/int/text())[1]', 'int') = 2 AND x.fields.value('(value/string/text())[1]', 'varchar(MAX)') = 'Email') then nothing is returned (quite logically).

I have also tried not to use CROSS APPLY and do a simple filter as such:

SELECT TableId, XmlField FROM MyTable
WHERE XmlField.exist('/dictionary/item/key/int[text() = 1]') = 1
AND XmlField.exist('/dictionary/item/value/string[text() = "Web"]') = 1

But then it acts like a OR and would return rows where the xml contains 2 key-value pairs such as (1, Email) and (2, Web)

Answer 1

Something like this should do it.

select *
from MyTable as T
where T.XmlField.exist('/dictionary[item[key/int/text() = 1 and value/string/text() = "Web"] and   
                                    item[key/int/text() = 2 and value/string/text() = "Email"]]') = 1