OData comes close to one, although it does not use SQL as its query language: http://www.odata.org/getting-started/understand-odata-in-6-steps/ http://www.odata

OData comes close to one, although it does not use SQL as its query language: http://www.odata.org/getting-started/understand-odata-in-6-steps/ http://www.odata.org/getting-started/understand-odata-in-6-s...