diff --git a/backend/seeds/clear_shop.sql b/backend/seeds/clear_shop.sql
index 3847e84..b0a3f21 100644
--- a/backend/seeds/clear_shop.sql
+++ b/backend/seeds/clear_shop.sql
@@ -4,7 +4,7 @@
 -- 或由脚本拼接:
 --   echo "SET @shop_code='S001';" | cat - clear_shop.sql | mysql ...
 
-SET @sid = (SELECT id FROM shops WHERE code = @shop_code LIMIT 1);
+SET @sid = (SELECT id FROM shops WHERE BINARY code = BINARY @shop_code LIMIT 1);
 
 SET FOREIGN_KEY_CHECKS = 0;