rollback

transactions and locks in SQL Server The transaction is all about Atomicity (atomicity). The concept of atomicity refers to the idea that some things can be treated as a unit. From a database standpoint, it refers to the smallest combination of one

Before MySQL 5.0.2, MySQL was not strict about illegal or improper values, and it also forced them into legal values for data entry. In the MySQL 5.0.2 and later versions, the previous default behavior is retained, but you can choose a more

This article originates from: http://www.dbasupport.com The answer here is not very comprehensive, these questions can be explained through a number of angles, perhaps you do not have to give a full answer in the interview process, only through your

Data | Database attached A: Introduction to the transaction A transaction is a series of actions executed as a single logical unit, which means that the actions are either all successful or fail altogether. If the last action fails, the previous

oracle| Security | strategy | data | database Oracle is a relational database management system, which has powerful function and excellent performance, and occupies an important position in today's large database management system. In the MIS system

You can define one or several autonomous transactions in a transaction (outer transaction). Autonomous transactions can be commit independently and do not have an impact on external affairs, and the rollback of the same outer transaction has no

PowerBuilder 's Data Window object is its unique intelligent object, its encapsulation is good, the function is formidable, the manifestation form is rich and diverse, for this reason, many MIS developers regard PowerBuilder as the preferred

Data | database Friends familiar with VFP know that in VFP we can use Remote view and SPT (SQL pass through) technology to control remote heterogeneous databases. These techniques are actually the encapsulation of the ODBC API, so it is as easy

Basic management operations for snapshots include deleting snapshots and rolling back snapshot operations. Delete snapshot: After selecting a snapshot in the list, click the Delete Snapshot button shown in the Blue border. Rollback SNAPSHOT: The

Data | database | Detailed Java database BASIC operations 1. Java database Operation Basic process 2, a few commonly used important skills: Scrollable, updated recordsets Batch Update Transaction processing Java database Operation basic process:

The easiest and safest way to ensure the consistency of data in a database system is to establish a foreign key constraint in the DBMS, but if the foreign key constraint is violated when the primary key data is deleted, the DBMS will give you the

oracle| Recovery | data | database First, user table space Error: ORA-01157,ORA-01110 or operating system-level errors such as ORA-07360 when you start the database will cause an error immediate when you close the database (using shutdown normal or

Now that you have learned all the details about the transactions managed by the Enterprise JavaBeans (EJB) container in part 1th, you may be curious about the transactions managed by the EJB bean and how you can implement it in the Apache Geronimo

1. Pattern objects A pattern is a collection of data logical structures or schema objects (schema object) that is owned by a database user with the same name as the user name. The pattern object is created and manipulated by SQL and contains the

Oracle Week 2nd: Rolling back monitoring How much longer will it take? : Rolling back monitoring Provide users with an accurate assessment of rollback operation time Are we still in this place? How much longer will it take? Does it sound

Computer hardware needs to be related to the driver to connect to work normally, these drivers are usually updated to improve the compatibility and stability of the hardware, but in the update hardware drivers will inevitably encounter abnormal or

Data | database | performance Storage performance Assessment When storing performance evaluations, we use the Disk Performance index (DPI, disk Performance Index), and the following table lists the indices in the DPI, which do not imply a full

We already know that log buffers are used to store log information about the changes in transactions to the data block. So what is the content of the log information here, and what is the structure of it? The smallest unit of Oracle record database

Example | Apply///This example shows how to write a SQLJ application that uses the JDBC application driver to access the DB2 database. The bank is the database in the DB2, the customer is the table in the bank Import java.sql.*; Import sqlj.runtime.*

One, input buffer Before describing how to do lexical analysis, let's say a question that is not mentioned--how to read a character stream from a source file. Why is the question so important? Because in lexical analysis, a character stream is