SQL Server 2014 JSON into table - json

Question

I'm using SQL Server 2014 and aware that out of the box it does not support JSON.
We are receiving data from a 3rd party supplier that will look like the below:
{
"PersonID": "1",
"MarketingPreference": "Allow",
"AllowPhone": "No",
"AllowEmail": "Yes",
"AllowTxt": "Yes",
"AllowMob": "Yes"
}
However, we may sometimes also receive the below:
{
"PersonID": "2",
"MarketingPreference": "DoNotAllow"
}
I need to insert these values into a table - what is the best way to do this if SQL Server 2014 does not support JSON?
If I convert the JSON to XML it looks like the below:
<PersonID>1</PersonID>
<MarketingPreference>Allow</MarketingPreference>
<AllowPhone>No</AllowPhone>
<AllowEmail>Yes</AllowEmail>
<AllowTxt>Yes</AllowTxt>
<AllowMob>Yes</AllowMob>
How do I then extract the values from the XML?
DECLARE #xml XML
SET #xml = N'
<PersonID>1</PersonID>
<MarketingPreference>Allow</MarketingPreference>
<AllowPhone>No</AllowPhone>
<AllowEmail>Yes</AllowEmail>
<AllowTxt>Yes</AllowTxt>
<AllowMob>Yes</AllowMob>'
SELECT
Tab.Col.value('#PersonID','int') AS ContactID,
Tab.Col.value('#MarketingPreference','varchar(20)') AS Pref,
Tab.Col.value('#AllowPhone','varchar(20)') AS Phone,
Tab.Col.value('#AllowEmail','varchar(20)') AS Email,
Tab.Col.value('#AllowTxt','varchar(20)') AS Txt,
Tab.Col.value('#AllowMob','varchar(20)') AS Mob
FROM
#xml.nodes('/root/') Tab(Col)
GO;
But now I get this error:
Incorrect syntax near 'GO'.
Is there an easier way to select the values from JSON?

Answer 1

You don't need a GO (never mind GO; which is not valid), and your XML syntax just seems to have been plucked from your first search result? Try:
SELECT PersonID = x.p.value('(PersonID)[1]', 'int'),
MarkPref = x.p.value('(MarketingPreference)[1]', 'varchar(20)'),
AllowPhone = x.p.value('(AllowPhone)[1]','varchar(20)'),
AllowEmail = x.p.value('(AllowEmail)[1]','varchar(20)'),
AllowTxt = x.p.value('(AllowTxt)[1]', 'varchar(20)'),
AllowMob = x.p.value('(AllowMob)[1]', 'varchar(20)')
FROM #xml.nodes('.') AS x(p);
Output:
PersonID
MarkPref
AllowPhone
AllowEmail
AllowTxt
AllowMob
1
Allow
No
Yes
Yes
Yes
Example db<>fiddle