Initial backup

db_backups/create_engineer_ratings_view.sql

@@ -0,0 +1,16 @@
+CREATE OR REPLACE VIEW engineer_ratings_view AS
+SELECT
+  s.engineer_name,
+  s.id_user,
+  COUNT(DISTINCT s.id) AS total_surveys,
+  ROUND(AVG( (jt.answer / jt.levels) * 5 ), 2) AS average_rating
+FROM surveys_answers s
+JOIN JSON_TABLE(
+  s.snapshot_json,
+  '$[*]' COLUMNS (
+    answer DECIMAL(5,2) PATH '$.answer',
+    levels DECIMAL(5,2) PATH '$.levels'
+  )
+) jt ON s.snapshot_json IS NOT NULL
+WHERE s.id_user IS NOT NULL
+GROUP BY s.id_user, s.engineer_name;