Transaction is to a group of operations combined into a logical unit of work. No error in the system case, developers can use to control transactions and to maintain an action for each transaction the continuity and integrity. Using this method may lead to the development of the two extremes: either all operations in the transaction have been executed or not any action been implemented. Such an approach is necessary for real-time applications. Banking is an example. Transactions should include from one account to another account of the transfer process. This process belongs to the transaction because of an account from another account into the expenditure and in two actions must be performed as a whole - any of the parties are not allowed to fail. ADO.NET Programming in-depth study, let us first take a look at is how the SQL transaction.
AOpen 16X DVD drive found MPC3 standards, compatible with the format: DVD-ROM, DVD-R, DVD-RW, DVD-Video, CD Series: CD-DA, CD-ROM/XA, CD-R, CD-RW , CD-I, Video CD, Photo-CD, CD-Extra, MTBF is 100,000 hours, the annex provides a manual, warranty card, DVD / CD audio cable, mounting screws, product manuals, there are a POWER DVD genuine disc. Although the IDE interface to be tight, but the interface for IDE CD-ROM market is more mature, IDE interface drives the price is quite reasonable, this AOpen 16X DVD drive price is only 145 yuan, or cost-effective than outstanding, for quite ordinary user to select it, and want to buy a good friend may wish to drive this product under consideration.