diff --git a/help/随机id生成 b/help/随机id生成
new file mode 100644
index 000000000..b509dd8f2
--- /dev/null
+++ b/help/随机id生成
@@ -0,0 +1,24 @@
+-- 生成 8 位随机不重复 ID 函数
+CREATE OR REPLACE FUNCTION next_8digit_rand_id(seq_name regclass)
+RETURNS integer AS $$
+DECLARE
+  base_val bigint;
+  rand8id  integer;
+BEGIN
+  base_val := nextval(seq_name);
+  rand8id := (10000000 + ((base_val * 1234567 # floor(random() * 99999999))::bigint % 90000000))::integer;
+  RETURN rand8id;
+END;
+$$ LANGUAGE plpgsql VOLATILE;
+
+-- 给 base_sys_user 绑定 8 位随机ID
+ALTER TABLE base_sys_user
+ALTER COLUMN id
+SET DEFAULT next_8digit_rand_id('base_sys_user_id_seq');
+
+
+
+
+ALTER TABLE base_sys_user
+ALTER COLUMN id
+SET DEFAULT nextval('base_sys_user_id_seq');