Add ability to plot saved queries using plotly, need to check performance in production, also need to improve generate_plot function

db.py

@@ -6,6 +6,7 @@ from datetime import datetime
 from dateutil.relativedelta import relativedelta
 from urllib.parse import urlparse
 from flask import g
+import pandas as pd
 from features.calendar import Calendar
 from features.exercises import Exercises
 from features.stats import Stats
@@ -60,6 +61,14 @@ class DataBase():
         cur.close()
 
         return (rv[0] if rv else None) if one else rv
+    
+    def read_sql_as_df(self, query, params=None):
+        conn = self.getDB()
+        try:
+            df = pd.read_sql(query, conn, params=params)
+            return df
+        except Exception as e:
+            raise e
 
     def get_exercise(self, exercise_id):
         exercise = self.execute(