diff --git a/fam-core/src/fam_core/db_layer.py b/fam-core/src/fam_core/db_layer.py
index e2c3221..1560651 100644
--- a/fam-core/src/fam_core/db_layer.py
+++ b/fam-core/src/fam_core/db_layer.py
@@ -114,7 +114,8 @@ def get_sync_videos(limit=15, offset=0, date_filter=None) -> List[Dict]:
         cur = conn.cursor(pymysql.cursors.DictCursor)
         # 录制时间优先，回退分析时间
         date_expr = "COALESCE(NULLIF(event_start_time,''), processed_at, updated_at, created_at)"
-        content_filter = ("v.filename LIKE 'motion_%' "
+        # 注意：pymysql execute 用 % 做参数占位符，SQL 字面量不能含 %，故用 LEFT 判断 motion_ 前缀
+        content_filter = ("LEFT(v.filename, 7) = 'motion_' "
                           "OR EXISTS(SELECT 1 FROM sync_events se WHERE se.video_id = v.id)")
         if date_filter:
             cur.execute(
@@ -530,7 +531,7 @@ def get_sync_stats(date_str: str = None) -> Dict:
                 """SELECT
                        (SELECT COUNT(*) FROM sync_videos sv
                           WHERE sv.status='done'
-                            AND (sv.filename LIKE 'motion_%'
+                            AND (LEFT(sv.filename, 7) = 'motion_'
                                  OR EXISTS(SELECT 1 FROM sync_events se WHERE se.video_id=sv.id))
                             AND {d} LIKE %s) AS videos,
                        (SELECT COUNT(*) FROM sync_events se
@@ -545,7 +546,7 @@ def get_sync_stats(date_str: str = None) -> Dict:
                 """SELECT
                        (SELECT COUNT(*) FROM sync_videos
                           WHERE status='done'
-                            AND (filename LIKE 'motion_%'
+                            AND (LEFT(filename, 7) = 'motion_'
                                  OR EXISTS(SELECT 1 FROM sync_events se WHERE se.video_id=sync_videos.id))) AS videos,
                        (SELECT COUNT(*) FROM sync_events) AS events,
                        (SELECT COALESCE(SUM(is_attention_event),0) FROM sync_events) AS attention""")