add: add sample sql help files #29

lib/service/diabetes-research-hub/cookbook/different-patient-column-names.sql

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+-- TODO: Use ChatGPT to fully understand what participant data represents and incorporate insights from GitHub discussions.
+-- If the column in the CSV file `participant` is `patient_id` and instead of `gender` the CSV file has `sex` as the column name.
+-- Drop and recreate the participant_data view
+DROP VIEW IF EXISTS drh_participant_data;
+CREATE VIEW drh_participant_data AS
+SELECT
+  patient_id AS participant_id, study_id, site_id, diagnosis_icd, med_rxnorm,
+  treatment_modality, sex AS gender, race_ethnicity, age, bmi, baseline_hba1c,
+  diabetes_type, study_arm
+FROM uniform_resource_participant;

lib/service/diabetes-research-hub/cookbook/sample-id-generation.sql

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+-- Drop the view if it exists
+DROP VIEW IF EXISTS drh_participant_data;
+
+-- Create a view with a prefixed and UUID-appended participant_id, and unchanged foreign key values
+CREATE VIEW drh_participant_data AS
+SELECT
+    -- Prefix with 'PART_' and append a UUID-like hex blob
+  'PART_' || lower(hex(randomblob(2)) || hex(randomblob(2))) AS participant_id, 
+  -- Foreign keys (study_id and site_id) must remain unchanged
+  study_id, site_id, diagnosis_icd, med_rxnorm,
+  treatment_modality, gender, race_ethnicity, age, bmi, baseline_hba1c,
+  diabetes_type, study_arm
+FROM uniform_resource_participant;