{ "type": "code_options", "author": "ccat", "source": "primary_key.md", "notebook_enable": false, "exercise_id": "f4608bdac8c84cca811582798709fae5", "container_url": "https://mydev.csdn.net/ssh?image=cimg-centos7-skilltreemysql&connect=auto&create=auto&utm_source=skill" }