rollback

data/2.OceanBase中阶/9.回滚事务/config.json

 {
   "keywords": [],
   "node_id": "oceanbase-173dda0ef67d4d178b9454191b8a2c7e",
-  "title": "回滚事务"
+  "title": "回滚事务",
+  "export": ["rollback.md"]
 }
\ No newline at end of file

data/2.OceanBase中阶/9.回滚事务/rollback.json

+{
+  "type": "code_options",
+  "author": "刘鑫",
+  "source": "rollback.md"
+}
\ No newline at end of file

data/2.OceanBase中阶/9.回滚事务/rollback.md

+# Rollback
+
+下列哪一个选项可以正确的回滚写入？
+
+## 答案
+
+```sql
+begin;
+insert into cust(c_city, c_first, c_last) select 'Tian Jin', 'Mars', 'Liu';
+rollback ;
+```
+
+## 选项
+
+### 先 commit 了
+
+```sql
+begin;
+insert into cust(c_city, c_first, c_last) select 'Tian Jin', 'Mars', 'Liu';
+commit;
+rollback ;
+```
+
+### 不必要的 end
+
+```sql
+begin;
+insert into cust(c_city, c_first, c_last) select 'Tian Jin', 'Mars', 'Liu';
+rollback ;
+end;
+```
+
+### 没有发起事务
+
+```sql
+insert into cust(c_city, c_first, c_last) select 'Tian Jin', 'Mars', 'Liu';
+rollback ;
+```