diff --git a/src/borgmanager/borg/repo.py b/src/borgmanager/borg/repo.py
index 639255c..33f91c0 100644
--- a/src/borgmanager/borg/repo.py
+++ b/src/borgmanager/borg/repo.py
@@ -7,7 +7,16 @@ class Repo(object):
         self.fingerprint = fingerprint
         self.location = location
         self.last_modified = last_modified
-        self.primary_key = primary_key
+        self.__primary_key = primary_key
+
+    @property
+    def primary_key(self):
+        if self.__primary_key is None:
+            raise ValueError("Primary key is None")
+        else:
+            return self.__primary_key
+
+    # region CLASS METHODS
 
     @classmethod
     def from_json(cls, json: dict):
@@ -19,3 +28,12 @@ class Repo(object):
     @classmethod
     def from_sql(cls, sql: tuple):
         return cls(sql[1], sql[2], sql[3], sql[0])
+
+    # endregion
+
+    # region GET
+
+    def seconds_since(self) -> float:
+        return (datetime.now() - self.last_modified).total_seconds()
+
+    # endregion
diff --git a/src/borgmanager/borg/stats.py b/src/borgmanager/borg/stats.py
index d847521..2c14284 100644
--- a/src/borgmanager/borg/stats.py
+++ b/src/borgmanager/borg/stats.py
@@ -1,10 +1,18 @@
 class Stats(object):
-    def __init__(self, file_count: int, original_size: int, compressed_size: int, deduplicated_size: int, primary_key=None):
+    def __init__(self, file_count: int, original_size: int, compressed_size: int, deduplicated_size: int,
+                 primary_key=None):
         self.file_count = file_count
         self.original_size = original_size
         self.compressed_size = compressed_size
         self.deduplicated_size = deduplicated_size
-        self.primary_key = primary_key
+        self.__primary_key = primary_key
+
+    @property
+    def primary_key(self):
+        if self.__primary_key is None:
+            raise ValueError("Primary key is None")
+        else:
+            return self.__primary_key
 
     @classmethod
     def from_json(cls, json: dict):
@@ -15,5 +23,10 @@ class Stats(object):
         return cls(file_count, original_size, compressed_size, deduplicated_size)
 
     @classmethod
-    def from_sql(cls, sql: list):
-        pass
\ No newline at end of file
+    def from_sql(cls, sql: tuple):
+        key = sql[0]
+        filecount = sql[3]
+        original_size = sql[4]
+        compressed_size = sql[5]
+        deduplicated_size = sql[6]
+        return cls(filecount, original_size, compressed_size, deduplicated_size, key)