diff --git a/hamstertools/__init__.py b/hamstertools/__init__.py
index 666b530..be12c92 100755
--- a/hamstertools/__init__.py
+++ b/hamstertools/__init__.py
@@ -9,8 +9,9 @@ import click
 import requests
 import sqlite3
 
-HAMSTER_DIR = Path.home() / '.local/share/hamster'
-HAMSTER_FILE = HAMSTER_DIR / 'hamster.db'
+# HAMSTER_DIR = Path.home() / '.local/share/hamster'
+# HAMSTER_FILE = HAMSTER_DIR / 'hamster.db'
+HAMSTER_FILE = 'hamster-testing.db'
 
 conn = sqlite3.connect(HAMSTER_FILE)
 c = conn.cursor()
@@ -703,7 +704,7 @@ def _import(username, mapping_path=None, output=None, category_search=None, afte
 @cli.command()
 def app():
     from .app import HamsterToolsApp
-    app = HamsterToolsApp(db_cursor=c)
+    app = HamsterToolsApp(db_cursor=c, db_connection=conn)
     app.run()
 
 
diff --git a/hamstertools/app.py b/hamstertools/app.py
index e8d6d2d..3836cc7 100644
--- a/hamstertools/app.py
+++ b/hamstertools/app.py
@@ -1,32 +1,58 @@
 from textual.app import App, ComposeResult
 from textual.widgets import Header, Footer, DataTable
+from textual.coordinate import Coordinate
 
 
-ROWS = [
-    ("lane", "swimmer", "country", "time"),
-    (4, "Joseph Schooling", "Singapore", 50.39),
-    (2, "Michael Phelps", "United States", 51.14),
-    (5, "Chad le Clos", "South Africa", 51.14),
-    (6, "László Cseh", "Hungary", 51.14),
-    (3, "Li Zhuhao", "China", 51.26),
-    (8, "Mehdy Metella", "France", 51.58),
-    (7, "Tom Shields", "United States", 51.73),
-    (1, "Aleksandr Sadovnikov", "Russia", 51.84),
-    (10, "Darren Burns", "Scotland", 51.84),
-]
-
 class HamsterToolsApp(App):
     """A Textual app to manage stopwatches."""
 
     BINDINGS = [
         ("q", "quit", "Quit"),
-        ("m", "mark", "Mark"),
+        ("s", "sort", "Sort"),
+        ("r", "refresh", "Refresh"),
+        ("d", "delete_activity", "Delete activity"),
     ]
 
-    def __init__(self, db_cursor):
+    def __init__(self, db_cursor, db_connection):
         self.db_cursor = db_cursor
+        self.db_connection = db_connection
         super().__init__()
 
+    def _refresh(self):
+        self.table.clear()
+
+        sql = '''
+        SELECT
+            categories.id AS category_id,
+            COALESCE(categories.name, '') AS category_name,
+            activities.id AS activity_id,
+            activities.name AS activity_name,
+            COALESCE(facts_count, 0) AS total_facts
+        FROM
+            activities
+        LEFT JOIN
+            categories
+        ON
+            activities.category_id = categories.id
+        LEFT JOIN (
+            SELECT
+                activity_id,
+                COUNT(*) AS facts_count
+            FROM
+                facts
+            GROUP BY
+                activity_id
+        ) AS facts_count_subquery
+        ON
+            activities.id = facts_count_subquery.activity_id;
+            '''
+
+        results = self.db_cursor.execute(sql)
+        # results = [[cell or "" for cell in row] for row in self.db_cursor.fetchall()]
+
+        self.table.add_rows(results)
+        self.table.sort(self.columns[1], self.columns[3])
+
     def compose(self) -> ComposeResult:
         """Create child widgets for the app."""
         yield Header()
@@ -34,26 +60,38 @@ class HamsterToolsApp(App):
         yield Footer()
 
     def on_mount(self) -> None:
-        table = self.query_one(DataTable)
-
-        sql = '''
-        SELECT
-            categories.id, categories.name, activities.id, activities.name
-        FROM
-            activities
-        LEFT JOIN
-            categories
-        ON
-            activities.category_id = categories.id '''
-
-        results = self.db_cursor.execute(sql)
-        results = [[cell or "" for cell in row] for row in self.db_cursor.fetchall()]
-
-        columns = table.add_columns("category id","category","activity ID","activity")
-
-        table.add_rows(results)
-        table.sort(columns[1], columns[3])
-        table.cursor_type = "row"
+        self.table = self.query_one(DataTable)
+        self.table.cursor_type = "row"
+        self.columns = self.table.add_columns("category id","category","activity ID","activity","entries")
+        self._refresh()
 
     def action_quit(self) -> None:
         self.exit()
+
+    def action_refresh(self) -> None:
+        self._refresh()
+
+    def action_sort(self) -> None:
+        self.table.cursor_type = "column"
+
+    def action_delete_activity(self) -> None:
+         # Get the keys for the row and column under the cursor.
+        row_key, _ = self.table.coordinate_to_cell_key(self.table.cursor_coordinate)
+
+        activity_id = self.table.get_cell_at(
+            Coordinate(self.table.cursor_coordinate.row, 2),
+        )
+
+        sql = 'DELETE FROM activities WHERE id = ?'
+        print(Coordinate(2, self.table.cursor_coordinate.row),)
+        print(activity_id)
+
+        self.db_cursor.execute(sql, (activity_id,))
+        self.db_connection.commit()
+
+        # Supply the row key to `remove_row` to delete the row.
+        self.table.remove_row(row_key)
+
+    def on_data_table_column_selected(self, event):
+        event.data_table.sort(event.column_key)
+        event.data_table.cursor_type = "row"