rollback transaction

Overviewthrough the analysis of the previous article, we know where the pager module is located throughout SQLite. It is the core module of SQLite, which plays a number of important roles. As a transaction manager, it implements the acid

1, Case...end (the specific value)The case is followed by a value, equivalent to the switch case in C #Note: You must have a condition after a case, and when after must be a value cannot be a condition.-----------------case--end---syntax structure---

First, what is a businessTransactions are used to guarantee the consistency of data, which consists of a set of related DML statements that are either all successful or fail altogether in the group's DML (data manipulation language, additions and

The first paradigm: Each column in a database table is a basic data item that cannot be re-divided, or a value that cannot have duplicate properties, such as having a telephone number in a table with a value that has both a cell phone and a landline

Reprint Please specify: HTTP://BLOG.CSDN.NET/UNIQUEWONDERQProblem: Use JDBC to connect to the database and realize the account transfer business. Transfer from a account to B account $500Scheme:In this case, in order to realize the transfer business,

first, the basic concept1, transaction (Transaction): is the basic unit of concurrency control. The so-called transaction, which is a sequence of operations that are either executed or not executed, is an inseparable unit of work. For example, a

I have a close understanding of the trigger. I saw a blog about the trigger of my senior brother. After reading it, I thought it was too difficult to get started. I finally got started with this plug-in! I would like to share with you this sharp

I am at a limited level. I write this blog only to help cainiao like me. Please do not laugh at me. I don't need to talk about the importance of databases. Most of the projects we do need to deal with databases. Therefore, a programmer must be

Orders @ orderIdnvarchar (50), -- order number @ userIdint, -- user number @ addressnvarchar (255), -- recipient address @ counter -- total amount asbegindeclare @ errorintset @ error0begintransaction -- Calculate total price select @

Recently, I am working on a paypal data capture program. As there is a ing relationship between all fields and paypal, all SQL statements must be spliced and uploaded to the stored procedure for execution. Recently, I am working on a paypal data

If set to on, set implicit_transactions sets the connection to implicit transaction mode. If it is set to off, the connection is restored to the automatic commit transaction mode. Set implicit_transactions on -- the user must submit or roll back

Create procedure testpro As /** // * ------- Start transaction ----------*/ Begin transaction tran_test /** // * -------- Save the transaction ----------*/ Save transaction tran_test /** // * -------- Data operation ---------*/ Insert [Table1]

We chose to use the stored procedure when implementing the recharge function in the charging system of the partner data center. Because this function requires two tables to be updated, it doesn't matter if you don't need the stored procedure. The

In practical applications, when we want to hand over a project to the customer, we need to clear all the previous test data of all tables in the database to give the customer a clean database, if there are many tables involved, it takes not only

Create PROCEDURE UpdateWanjun@ UserName nvarchar (500 ),@ UserPassword nvarchar (500 ),@ ReturnVal int outputAS-- Set XAcT_ABORT ONBegin Transaction TUpdate admins set UserPassword = @ UserPassword where UserName = @ UserNameUpdate admins set

Methods and Techniques for using ADO. NET The following code illustrates how to use the SqlDataAdapter object to generate a DataSet or able command. It retrieves a group of product categories from the SQL Server Northwind database. Using System.

• Description of DML and restored data generation • Monitoring and Management of restored data • Description of differences between restored data and redone data • Configuration of restoration retention time • guaranteed restoration retention time •

Oracle BASICS (7): database transactions and oracle transactionsI. Basic Concepts1. Transaction: The basic unit of concurrency control. A transaction is a sequence of operations. These operations are either executed or not executed. It is an

JAVA learning notes ()-Transaction and batch processing, javatransactionTransaction /** Transaction * JDBC Enables automatic Transaction commit by default. You need to disable the Transaction to manually control the Transaction. ** by default, the

After and Instead of triggers, instead triggers L After triggers: these triggers are activated and executed only after the record has been changed. They are mainly used to record the processing or check After the change. Once an error is found, you