finish tutorial 2

knightvvitch · Feb 1, 2022 · 6af9ba2 · 6af9ba2
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diff --git a/figures/p-sql_to_r_workflows-prod_workflow.svg b/figures/p-sql_to_r_workflows-prod_workflow.svg
diff --git a/tutorials/p-sql_to_r_workflows/hobbit_enrolments.sql b/tutorials/p-sql_to_r_workflows/hobbit_enrolments.sql
@@ -0,0 +1,20 @@
+SELECT 
+  s.student_id, 
+  CONCAT(s.first_name, ' ', s.last_name) AS student_name,
+  c.course_id,
+  c.course_name,
+  ROW_NUMBER() OVER (PARTITION BY s.student_id ORDER BY e.start_date) 
+    AS course_sequence,
+  e.start_date,
+  e.end_date
+
+  FROM education.enrolment AS e
+  INNER JOIN education.student AS s
+  ON e.student_id = s.student_id
+
+  INNER JOIN education.course as c
+  on e.course_id = c.course_id
+
+  WHERE start_date <= '2005-01-01'
+
+  ORDER BY student_id, start_date
diff --git a/tutorials/p-sql_to_r_workflows/hobbit_enrolments_flex.sql b/tutorials/p-sql_to_r_workflows/hobbit_enrolments_flex.sql
@@ -0,0 +1,20 @@
+SELECT 
+  s.student_id, 
+  CONCAT(s.first_name, ' ', s.last_name) AS student_name,
+  c.course_id,
+  c.course_name,
+  ROW_NUMBER() OVER (PARTITION BY s.student_id ORDER BY e.start_date) 
+    AS course_sequence,
+  e.start_date,
+  e.end_date
+
+  FROM education.enrolment AS e
+  INNER JOIN education.student AS s
+  ON e.student_id = s.student_id
+
+  INNER JOIN education.course as c
+  on e.course_id = c.course_id
+
+  WHERE start_date <= {before_date}
+
+  ORDER BY student_id, start_date