Update README.md

README.md

@@ -75,6 +75,7 @@ We used [Nathan Cooper's](https://github.com/ncoop57/function_parser) `function_
 The columns provided are as follows:
 | Column            | Type       | Notes                                                                                           |
 | ----------------- | ---------- | ----------------------------------------------------------------------------------------------- |
+| id                | Int64      | Unique id of the function
 | project           | Int64      | DyPyBench project id                                                                            |
 | nwo               | string     | Project name in repo/project format                                                             |
 | sha               | string     | SHA commit hash                                                                                 |