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如何设置savepoint

时间: 2024-03-02 20:49:57 浏览: 101

控制事务-[feiq]Oracle数据库

控制事务 ROLLBACK to SAVEPOINT B ROLLBACK to SAVEPOINT A ROLLBACK DELETE INSERT UPDATE INSERT 保存点 A Time COMMIT 保存点 B 事务 Explicit Transaction Control Statements You can control the logic of transactions by using the COMMIT, SAVEPOINT, and ROLLBACK statements. Note: SAVEPOINT is not ANSI standard SQL. Instructor Note Savepoints are not schema objects and cannot be referenced in the data dictionary.

在关系数据库中，可以使用SQL语句设置savepoint，具体方式如下： ``` SAVEPOINT savepoint_name; ``` 其中，savepoint_name是你自定义的保存点名称。在设置了保存点之后，可以进行一系列的操作，如果这些操作成功执行，就可以对保存点进行提交，如果执行失败，就可以回滚到保存点。提交保存点： ``` COMMIT TO savepoint_name; ``` 回滚到保存点： ``` ROLLBACK TO savepoint_name; ``` 需要注意的是，设置保存点的操作只在事务中有效，也就是必须先开启事务才能设置保存点。

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