diff --git a/README.md b/README.md
index 8b04590..6249678 100644
--- a/README.md
+++ b/README.md
@@ -19,8 +19,10 @@ The following shows REPEATABLE READ implemented via snapshot isolation.
   - DML
     - [x] CRUD (SELECT, INSERT, DELETE, and UPDATE)
     - [x] Filtering (WHERE)
-    - [ ] Join
-      - [ ] Nested Loop Join
+    - [x] Join
+      - [x] Nested Loop Join
+        - [x] Inner Join
+        - [x] Left Join
     - [ ] Aggregation (GROUP BY and HAVING)
     - [ ] Sorting (ORDER BY and LIMIT)
   - DDL