begintransaction

Oracle's transactional operations, which sometimes want to perform a single failure in the bulk operation of a data collection, are to roll back all operations to avoid data anomalies. . NET provides us with good transactional operations, Oracle

The purpose of the merge is to have a new object, and if the object sets an id, the object is treated as a free state:When the ID cannot be found in the database, the update will definitely report the exception, but with the merge, it will be insert.

[Fragment Series 7] Fragment switching optimization and fragment Switching1. Fragment + RadioGroup Failover failover requires Fragment switching in the project. It always uses the replace () method to replace Fragment. Then, it always feels stuck

A simple Hibernate tutorial   I have found a lot of Hibernate related tutorials on the Internet. Most of them are based on WEB servers, and I write a separateIn Eclipse, you do not need to write your own ANT script, and do not need to use the web

In the process of implementing business logic, it is often necessary to guarantee the exclusivity of data access. Therefore, we need some mechanism to ensure that the data will not be modified by the outside in the course of operation, such a

Android ui-implements the bottom Toggle tab (fragment) Prefacethis blog to share a UI effect-to achieve the bottom of the switch label, presumably everyone in some applications have encountered such a effect, the most typical is the ability to

Two solutions for implementing MySQL nested transactions in PHP first, the origin of the problemThere is a clear explanation in the official MySQL documentation that nested transactions are not supported:[SQL]View Plaincopy

In the previous two articles, we have already made a general understanding of NHibernateORM: NHibernate (i) Introduction NHibernate: Solve the problem of object and database transformationORM: NHibernate (ii) Use the Codesmith to quickly generate

Object stateStatus of objects in Hibernate: Temporary/transient status Persistent state Free State Learning Hibernate's object state is to better understand Hibernate's design ideas, and is the basis of a first-level cache ...

First, object recognition For a database, the only way to record uniqueness is based on the value of the primary key, if there are two records on the hand, they have the same primary key value, they represent the same object's record in the

As the new object introduced after Android 3.0, Actionbar can be said to be a convenient and fast navigation artifact. It can serve as the title of the activity, highlighting some key actions of the activity (such as "search", "create", "share", etc.

Most of the operations with PHP are working with a variety of databases, including Mysql,redis,memcache and other relational and relational databases, so an application will have a large number of connections to the database operation, if not a

First, the origin of the problemThere is a clear explanation in the official MySQL documentation that nested transactions are not supported:1. Transactions cannot be nested. This was a consequence of the implicit commit performed for any current

First, the origin of the problemThere is a clear explanation in the official MySQL documentation that nested transactions are not supported:1. Transactions cannot be nested. This was a consequence of the implicit commit performed for any current

When we need dynamic multi-interface switching, we need to combine UI elements and activity into one module. In 2.3 We usually jump through various activities to achieve multi-interface jumps and a single interface dynamic change. The new features

Slidingmenu Introduction:Slidingmenu is a relatively new setup interface or configuration interface effect, in the main interface left or right slide display settings interface, can easily do a variety of operations. There are a lot of applications

1.hibernate.cfg.xml Common ConfigurationHibernate.show_sql whether to output the Hibernate runtime SQL statements to the console with a value of true, FalseHibernate.format_sql whether the SQL statement output to the console is formatted with a

Php implements powerful MYSQL encapsulation class instances based on PDO, pdomysql This example describes the MYSQL encapsulation class that php implements with powerful functions based on PDO. We will share this with you for your reference. The

The following program uses the Hibernate API to update the AGE fields of all records whose AGE is greater than zero in the MERs table in batches:Tx = session. beginTransaction (); Iterator MERs = session. find ("from Customer c where c. age> 0 ").

Hibernate_8_Person and IdCard instance _ one-to-one relationship: Based on Foreign keys 1) create a Person class: public class Person {private Integer id;private String name;private IdCard IdCard;public String getName() {return name;}public void