1: 在mysql中,手动提交事务的案例:CREATE PROCEDURE tfer_funds (from_account int, to_account int, tfer_amount numeric(10,2)) BEGIN SET autocommit=0; UPDATE account_balance SET balance=balance-tfer_amount WHERE account_id=from_account;
有时候数据库挂掉,起库会出现ORA-00704错误,而导致ORA-00704错误的根本原因是訪问OBJ$的时候.ORACLE须要回滚段中的数据,而訪问回滚段的时候须要的undo数据已经被覆盖,此时我们能够通过bbed工具手工提交事务.从而解决问题. 使用bbed提交事务測试步骤例如以下: JP@ORCL>create table JP_BBED_TEST as select * from hr.employees where rownum<=10; Table created. JP@
参考博客原文地址: https://www.jb51.net/article/168398.htm https://www.cnblogs.com/mianteno/p/10692633.html http://www.pianshen.com/article/4112200143/ 1.构造器依赖循环 代码示例: @Component public class A { private B b; @Autowired public A(B b) { this.b=b; } } @Componen