MySQL 事务回滚。在执行删除、更新等操作时，防止误操作

SELECT * FROM TABLE_NAME I WHERE I.TRANS_NO=\'P-2019000025\'; # 原始数据
START TRANSACTION;
SELECT COUNT(1) FROM TABLE_NAME I;  #10条
DELETE FROM TABLE_NAME  WHERE TRANS_NO=\'P-2019000025\';
SELECT COUNT(1) FROM TABLE_NAME I;  #删除后还有9条
ROLLBACK;
SELECT * FROM TABLE_NAME I WHERE I.TRANS_NO=\'P-2019000025\'; # 原始数据没变

确保DELETE SQL 没问题后，再拿出来单独执行