begintransaction

A transaction (Transaction) is an important feature in the operational database that allows you to book a single, or a series of SQL statements, and then execute them together, and, in the course of execution, you can roll back all the changed

A transaction (Transaction) is an important feature in the operational database that allows you to book a single, or a series of SQL statements, and then execute them together, and, in the course of execution, you can roll back all the changed

DotNetCore cross-platform ~ EFCore discards Context. Database. BeginTransaction replaced by TransactionScope, TransactionScope is. net platform-based Distributed Transaction component, which is a local transaction by default, and can be

    $ DSN = 'Sqlsrv: Server =. \ sqlexpress; database = thinkphp' ; $ User = 'Admin' ; $ Password = 'Pass1234' ; Try { $ Conn = New PDO ($ DSN , $ User , $ Password );} Catch (Pdoexception $ E ){ Echo 'Connection failed :'. $ E ->

Session.gettransaction () only gets a transaction instance based on the session, but does not start itSession.begintransaction () calls its begin () method after acquiring a transaction(1)Session = Hibernateutil.getsession ();//This is the operation

The following example creates an oledbconnection and an oledbtransaction. It also demonstrates how to use the begintransaction, commit, and rollback methods. Public void runoledbtransaction (string myconnstring){Oledbconnection myconnection = new

Commit commit 1. Add a data record and add it to the transaction. Package com. itheima. util; Import org. hibernate. Session;Import org. hibernate. SessionFactory;Import org. hibernate. cfg. Configuration;// Hibenate tool classPublic class

Hibernate 3-stateI. Overview (I) Instantaneous State (temporary state) In an object, if the object has just been created but is not persistent, It is a transient state. Features: (1) not associated with the Session instance (2) There is no record

Python Memory NoSQL DatabaseFrom the network, after modification, adhering to the spirit of open source, feedback network!#!/usr/bin/python #-*-coding:utf-8-*-# # memdb.py # python Memory db # # 2015-12 ################################### ###########

ado|server| Control 1 Concurrency consistency issues Common concurrency problems include: lost modifications, non-repetitive reading, dirty data reading, Phantom Reading (phantom reading is often classified as a type of non repeatable reading in

Hibernate provides two levels of Cache Session-level cache: It is a cache within the scope of transactions. This level of cache is managed by hibernate, and no intervention is required in general. Sessionfactory-level cache: It is a process-specific

This article is a series of articles, I am in the long-distance development of Android a little thoughts and records, I will try to follow the first easy after the difficult sequence to write the series. The series cited the "Android Development art

Package com. yl. Demo; Import java. util. iterator;Import java. util. List; Import org. hibernate. hibernateexception;Import org. hibernate. query;Import org. hibernate. Session;Import org. hibernate. sessionfactory;Import org. hibernate.

In C # programming, we usually perform database operations in the try statement block.Set the start and end of the transaction before and after database operations in try, and use the RollBack action in catch exception handling.This ensures that the

This article describes the concept of a one-level, two-level cache in Hibernate and how to use it.First, the outline2. What is a first-level cache3. First-level cache example Display4. Level Two cache and sample display5. SummarySecond, what is a

section II: Session Common Methods explained2) load and get () method:There is no record in the database corresponding to the OID, and the load () method throws an exception: the Load method defaults to lazy loading, and the Load object is a proxy

Introduction: As we discussed in the 16th chapter, "Overview inserts, updates, and deletes data," the features built in the GridView control support editing and deletion of data for each row, You just have to move your mouse a little bit to create

1. Preface A secondary cache is a cache mechanism that belongs to the sessionfactory level and is a process-wide cache. The first-level cache is the session-level cache, which is a transaction-scoped cache that is managed by hibernate and generally

 1. Concurrency consistency Common concurrency consistency problems include: Lost modifications, non-repeated reads, dirty reads, and Phantom reads (Phantom reads are often classified as non-repeated reads in some materials ).1.1 lost

Document directory 2.2.1 concurrency consistency 2.2.2 solutions to concurrency consistency problems 2.2.3 transaction isolation level 2.2 SQL Server 2000 + ADO. Net concurrency control 2.2.1 concurrency consistency Common concurrency