Add sql example + postman collection

[evshvarov]

@grongierisc, let's use Fhirtemplate.SQLVar class rather than User?

[grongierisc]

@grongierisc, let's use Fhirtemplate.SQLVar class rather than User?

If we do so, we have to change all the sql statement from

SELECT 
ID, Key, ResourceString, 
GetJSON(ResourceString,'valueQuantity') as valueQuantity
FROM HSFHIR_I0001_R.Rsrc where Key = 'Observation/16'

To

SELECT 
ID, Key, ResourceString, 
Fhirtemplate_GetJSON(ResourceString,'valueQuantity') as valueQuantity
FROM HSFHIR_I0001_R.Rsrc where Key = 'Observation/16'

Personally, I prefer GetJSON than Fhirtemplate_GetJSON

[evshvarov]

Got you, fine!