rollback

Summary Atomic transaction processing is a widely known technique for ensuring consistency in the event of a failure. The ACID properties of atomic transactions ensure that state consistency is maintained in even complex business applications,

Finally put OCP DBA's course all finished, tired Ah! Overall Oracle certification is worth the test. I have CCNP, MCSE certificate, but through the DBA examination, feel not only deepened the understanding of modern databases, but also enrich the

This article provides an open source JavaScript library that provides the ability to add bookmarks and fallback buttons to AJAX applications. After completing this tutorial, developers will be able to get a solution to the problems encountered in

Control author of the February Microsoft Community Star Microsoft Community Star In programming, you often need to use transactions. A business is a series of operations that must be successful, and all other steps must be undone as long as one

Data | database 1. Invoke instanceString prm1,prm2,prm3;ResultSet Rst=null;Prm1 = ...;Prm2 = ...;PRM3 = ...;Querybean.setconnection ("Sun.jdbc.odbc.JdbcOdbcDriver", "JDBC:ODBC: Data Source name", "sa", ""); try{ string[] param = {PRM1,PRM2,PRM3};/*

1. Introduction to Basic table space A. system table space Main storage data dictionary and Internal system table base table To view the SQL of the Data data dictionary SELECT * FROM Dict To view the SQL for an internal system table SELECT *

oracle| problems to start Oracle common problem Analysis (2003-10-1) This article is from "Network Administrator World" 2003 phase 10th "Fault Diagnosis" column The startup and shutdown of instances and databases is one of the important

In practical applications, when we are ready to hand over a project to the customer for use, we need to clear all the tables in the library before the test data to give the customer a clean database, if the table involved a lot, to be emptied, not

On the itpub, I saw someone raise the question. In SQL Server or some other database, DDL statements can be rolled back, so why can't oracle rollback DDL statements? To illustrate this issue, first you need to explain what a DDL statement is. A DDL

Contains crud, transactions, tree recursive queries, paging, and more. Demonstrate the simplicity of glamour. All parameters are escape, there is no injection problem. /* * Anthony.chen * Reserved */ Class DB { Query types Const SELECT = 1;

I split the model into pieces, a,b,c,d,e,f, what do these pieces represent? First A, this base represents the base class of the entire frame, and all model files must inherit from the base class; Since B's content depends on D, let's say first D,

asp.net| data Many database operations need to be transacted, and there are roughly 3 levels of transactions under ASP.net: (1) Transaction at the level of the stored procedure (2) Ado.net-level transactions (3) asp.net transaction at the page level

Web|web Services | access | data | database Absrtact: This paper analyzes the current situation of database access middleware, points out the existing problems, and draws the necessity of applying new technology. A database access middleware WSDBM

Case study (1) Let's say I modified a piece of data: Update people set name= ' Fusnow ' where name= ' old Fusnow '; The things I need to do include: Generate redo information in redo log buffer (including Redo,undo redo of the table, index or

After the system crashes, use the DB2 transaction log to recover the database. How many times have you encountered the error message "sql0946c The transaction log for the"? When trying to solve the problem, do you stop to think about the following

server| triggers SQL SERVER 2005, a new addition to a number of new features, in which DDL triggers are a good choice, based on the information of the preliminary study as follows, now sorted: In SQL Server 2000, after triggers can only be defined

oracle| Script In a longer period of interaction with Oracle, each DBA, especially some heroes have a variety of scripting tools to complete a variety of purposes, so very convenient and quick to complete the day-to-day work, the following part of

This article mainly introduced in Python to write a database module tutorial, this article code based on python2.x version, the need for friends can refer to the In a web app, all data, including user information, published logs, comments, and so

Flashback is a feature that Oracle has been offering since 9i, using Oracle queries in 9i to implement data that has been manipulated for a specified period of time from the rollback segment, to perform data alignment, or to correct error data due

Introduction to Database Transactions A database transaction is a logical unit of work that consists of a set of SQL statements. You can think of a transaction as an irreducible set of SQL statements that are permanently recorded in the database or