FQL is a query language that allows you to retrieve, filter and project data from any data source containing FHIR Resources. It brings the power of three existing languages together: SQL, JSON and FhirPath. It allows you to create tables and is useful for gaining insight and perform quality control.
<Observation xmlns="http://hl7.org/fhir"> <id value="b29282f6-3498-4cee-8ea8-0cc54f45dddc" /> <meta> <versionId value="1" /> <lastUpdated value="2021-03-12T10:54:04.126-05:00" /> <source value="#PYm1s7IOmQcC4MBf" /> </meta> <status value="final" /> <category> <coding> <system value="http://terminology.hl7.org/CodeSystem/observation-category" /> <code value="laboratory" /> <display value="laboratory" /> </coding> </category> <code> <coding> <system value="http://loinc.org" /> <code value="14804-9" /> <display value="Lactate dehydrogenase [Enzymatic activity/volume] in Serum or Plasma by Lactate to pyruvate reaction" /> </coding> <coding> <system value="http://loinc.org" /> <code value="2532-0" /> <display value="Lactate dehydrogenase [Enzymatic activity/volume] in Serum or Plasma" /> </coding> <text value="Lactate dehydrogenase [Enzymatic activity/volume] in Serum or Plasma by Lactate to pyruvate reaction" /> </code> <subject> <reference value="Patient/1d86bcfe-6359-4c82-add8-770fe8b14b50" /> </subject> <encounter> <reference value="Encounter/182465e2-3eef-434a-b9ff-94f632202bd9" /> </encounter> <effectiveDateTime value="2020-03-13T14:42:17-04:00" /> <issued value="2020-03-13T14:42:17.901-04:00" /> <valueQuantity> <value value="341.62" /> <unit value="U/L" /> <system value="http://unitsofmeasure.org" /> <code value="U/L" /> </valueQuantity> </Observation>