SNOMED CT Implementation Guide for the LOINC Ontology

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If the LOINC Ontology has been loaded in a relational database using a model that complies with the RF2 specification for tables and column names, the  content can be accessed using SQL queries in line with the examples below. To Set up SNOMED CT in a relational database, please follow the guidance and instructions provided in the SQL Practical Guide.

SQL Examples

Service Name

SQL Query  6

Result

Get all members of the reference set

The reference set used in this example is:

635111010000100 |Logical Observation Identifiers Names and Codes Orderable Reference Set (foundation metadata concept)|

SELECT referencedComponentId FROM snap_refset_simple
    WHERE active=1 AND refsetId=[refsetId];

for example

SELECT referencedComponentId FROM snap_refset_simple
    WHERE active=1 AND refsetId=635111010000100;

Returns the ids of all the concepts or descriptions that are the members of the reference set.


Test if a concept is a member of the reference set


The concept used in this example is:
141951010000102 |Mass concentration of neopterin in urine at point in time (observable entity)|

SELECT count(referencedComponentId)
    FROM snap_refset_simple
    WHERE active=1 AND refsetId=[refsetId]
      AND referencedComponentId=[candidateComponentId];

for example

SELECT count(referencedComponentId)
    FROM snap_refset_simple
    WHERE active=1 AND refsetId=635111010000100 
		AND referencedComponentId=141951010000102;

Returns:

  • 0 : if the candidate component is not in the reference set.
  • 1 : If the candidate component is a member of the reference set
    • Some types or reference set can include the same component more than once, so any value greater than zero indicate the component is a member of the references set.
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