diff --git a/database/user_relations_index.sql b/database/user_relations_index.sql
new file mode 100644
index 0000000..80b4fc2
--- /dev/null
+++ b/database/user_relations_index.sql
@@ -0,0 +1,44 @@
+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : postgresql_localhost
+ Source Server Type    : PostgreSQL
+ Source Server Version : 100007
+ Source Host           : localhost:5432
+ Source Catalog        : oschina
+ Source Schema         : iTags
+
+ Target Server Type    : PostgreSQL
+ Target Server Version : 100007
+ File Encoding         : 65001
+
+ Date: 13/03/2019 10:53:13
+*/
+
+
+-- ----------------------------
+-- Table structure for user_relations
+-- ----------------------------
+create sequence user_relations_id_seq;
+DROP TABLE IF EXISTS "iTags"."user_relations";
+CREATE TABLE "iTags"."user_relations" (
+  "id" int8 NOT NULL  DEFAULT nextval('"iTags".user_relations_id_seq'::regclass),
+  "uid" int8 NOT NULL DEFAULT NULL,
+  "uid2" int8 NOT NULL DEFAULT NULL,
+  "relation" float8 NOT NULL DEFAULT NULL
+)
+;
+
+-- ----------------------------
+-- Indexes structure for table user_relations
+-- ----------------------------
+CREATE INDEX "uid_uid2" ON "iTags"."user_relations" USING btree (
+  "uid" "pg_catalog"."int8_ops" ASC NULLS LAST,
+  "uid2" "pg_catalog"."int8_ops" ASC NULLS LAST
+);
+
+-- ----------------------------
+-- Primary Key structure for table user_relations
+-- ----------------------------
+ALTER TABLE "iTags"."user_relations" ADD CONSTRAINT "posted_articles_copy1_pkey" PRIMARY KEY ("id");
+alter sequence user_relations_id_seq owned by "iTags"."user_relations"."id";