diff --git a/PostgreSQL/index.sql b/PostgreSQL/index.sql
new file mode 100644
index 0000000..8d7f54d
--- /dev/null
+++ b/PostgreSQL/index.sql
@@ -0,0 +1,2 @@
+-- 不阻塞的情况下创建索引
+create index concurrently idx_prism_timestamp on activities (timestamp);
\ No newline at end of file