reworked database schema again with foreign keys

dwtt

@@ -51,14 +51,17 @@ CREATE TABLE tasks (
     parent TEXT
 )''')
     c.execute('''
-CREATE TABLE aliases (
-    name TEXT PRIMARY KEY,
-    project TEXT
-)''')
-    c.execute('''
 CREATE TABLE entries (
     when INTEGER PRIMARY KEY,
-    name TEXT
+    taskid INTEGER,
+    hours REAL,
+    FOREIGN KEY (taskid) REFERENCES tasks(id)
+)''')
+    c.execute('''
+CREATE TABLE history (
+    id INTEGER PRIMARY KEY,
+    taskid INTEGER,
+    FOREIGN KEY (taskid) REFERENCES tasks(id)
 )''')
     conn.commit()
     c.close()