LOCK TABLES对事务不安全,并且在试图锁定表之前隐式提交任何活动事务. UNLOCK TABLES只有在LOCK TABLES已经获取到表锁时,会隐式提交任何活动事务.对于下面的一组语句,UNLOCK TABLES释放了全局读锁,但是因为没有表锁,不会提交事务. FLUSH TABLES WITH READ LOCK; START TRANSACTION; SELECT ... ; UNLOCK TABLES; 开始一个事务(例如,START TRANSACTION)隐式地提交任何当前事…

There has been widespread characterization of one of the major distinctions between NoSQL and traditional DBMSs by saying that the former don’t care for ACID semantics or that transactions aren’t needed. This is an oversimplification to say the least…

1:本地事务DbTransaction和分布式事务TransactionScope的区别: 1.1:System.Data.Common.DbTransaction: 本地事务:这个没什么好说了,就是单个事务,每种数据库都有自己的实现,事务的深度内涵可以搜索查看相关的文章,不是本文介绍的重点. 1.2:System.Transactions.TransactionScope: 分布式事务,需要添加引用System.Transactions,同时启用MSDTC分布式事务服务:通常使用方式为:  u…

java.lang.IllegalStateException: Not allowed to create transaction on sharedEntityManager - use Spring transactions or EJB CMT instead 原因以我的理解是,SPRING的配置中没有开启事务.解决方法,在@Transactionalpublic class CategoryDAO {...}的实现类上,加上事务的注解.问题解决可以写入数据库,但是有一点还是不清楚,如果…

First in day worksheets + Purchase Transactions (Receipts, Bills, Adjustments, Assembly Builds) + Transfers and Transfer Orders (Shipments and Receipts) - Vender Return Shipments - Sales Transactions (Fulfilments, Invoices, Cash Sales, Adjustment, Co…

原文地址:http://www.fpga4fun.com/PCI-Express6.html Let's try to control LEDs from the PCI Express bus. Xilinx's "Endpoint Block Plus" core allows us to work at the transaction layer level, so it's just going to take us a few lines of code.Instead of…

本文转自:http://blog.sina.com.cn/s/blog_66f845010100qelf.html 一, Transaction control 默认Transaction 由修改数据开始(获得TX LOCK), 手工也可以用set transaction或DBMS_TRANSACTION来控制, 由COMMIT,ROLLBACK结束(ROLLBACK TO SAVEPOINT并不会结束一个TRANSACTION). TRANSACTION语句包含以下COMMIT, ROLLBA…

Links EntityFramework This is a .net ORM Mapper Framework from Microsoft to help you talking with your Database in an object oriented manner. Wikipedia Database Transaction A database transaction, by definition, must be atomic, consistent, isolated a…

Data Developer Center > Learn > Entity Framework > Get Started > Working with Transactions (EF6 Onwards) EF6 Onwards Only - The features, APIs, etc. discussed in this page were introduced in Entity Framework 6. If you are using an earlier vers…

A SqlConnection consists of two parts: the public instance that your code interacts with (the outer connection) and a hidden connection that represents an actual server connection (the inner connection). When you call the Open method on the outer con…