In Azure DocumentDB some queries don't work - azure

Question

I used Azure DocumentDB to store some Key-Values pairs. This is the structure of the document I used
{
"Key": "Deleted",
"Value": {
"email": "abc#cdf.com"
}
}
When i write DocumentDB query like this,
SELECT C.Value FROM C
This query does not work. Here is the error message I get.
Syntax error, incorrect syntax near 'Value'.
But this query works fine,
SELECT C.Key FROM C
I understand 'Value' should be a keyword in azure documentdb. How can i query it?

Answer 1

Value is a keyword in DocumentDB syntax so this is why you get an error. See Value keyword in this article DocumentDB syntax - The VALUE keyword provides a way to return JSON value.
To get around this you can query it the way Yannick has said i.e.
SELECT C['Value'] FROM C

Answer 2

Because your documents are stored as JSON, you can access them as follows:
SELECT C['Value'] FROM C
This will result in:
[
{
"Value": {
"email": "abc#cdf.com"
}
}
]

Answer 3

In DocumentDB query grammar, the syntax < collection_expresion >.property_name is exactly same as < collection_expression >["property_name"]. So, effectively,
c.name
is same as
c["name"]
The syntax < collection_expression >["property_name"] allows one to derefence properties which might have non-identifier characters like 'my value' (space between my and value), or keywords like 'Value', 'Select' etc.
Hence,
SELECT C["Value"]
FROM C
will work in your case.