diff --git a/erd/erd_documentation.md b/erd/erd_documentation.md
new file mode 100644
index 0000000..94c0d77
--- /dev/null
+++ b/erd/erd_documentation.md
@@ -0,0 +1,20 @@
+# ERD Documentation
+
+## Diagrams
+
+### Get
+- user_id: INTEGER
+- get_id: INTEGER (Primary Key)
+
+### User
+- user_id: INTEGER (Primary Key)
+- user_name: VARCHAR
+
+### Post
+- user_id: INTEGER
+- post_id: INTEGER (Primary Key)
+
+## Relationships
+
+- User.user_id -> Get.user_id (1:N)
+- User.user_id -> Post.user_id (1:N)
\ No newline at end of file