diff --git a/src/main/resources/mapper/PeerMapper.xml b/src/main/resources/mapper/PeerMapper.xml
index b3d4780..4c90eae 100644
--- a/src/main/resources/mapper/PeerMapper.xml
+++ b/src/main/resources/mapper/PeerMapper.xml
@@ -10,6 +10,22 @@
         SELECT * FROM peers
         WHERE info_hash = #{infoHash} and peer_id = #{peerId}
     </select>
+    <select id="selectAllInfoHashesWithPeers" resultType="String">
+        SELECT DISTINCT info_hash FROM peers
+    </select>
+
+    <select id="countRecentActivity" resultType="Long" parameterType="String">
+        SELECT COUNT(*) FROM peers
+        WHERE info_hash = #{infoHash}
+        AND last_activity_time >= DATE_SUB(NOW(), INTERVAL 7 DAY)
+    </select>
+    <select id="selectByInfoHashList" parameterType="list" resultType="com.example.g8backend.entity.Torrent">
+        SELECT * FROM torrents
+        WHERE info_hash IN
+        <foreach item="item" index="index" collection="infoHashes" open="(" separator="," close=")">
+            #{item}
+        </foreach>
+    </select>
     <update id="updatePeer">
         UPDATE peers
         SET uploaded = #{uploaded}, downloaded = #{downloaded}