brian layman

At present, the application of network database has become one of the most widely used, and the security of database, performance is the most important thing that enterprises care about. The database is becoming the lifeblood of the enterprise, and

The function of Oracle:redo in layman's Oracle uses redo to ensure that transactions in the database can be replayed, so that data can be restored after a failure. Redo is critical for Oracle databases. In the database, the functions of Redo are

: http://pan.baidu.com/s/1c1rsW1q Password: mjslCourse Outline:MongoDB Basics:1th, NoSQL and MongoDB (the background of NoSQL, the introduction of various NoSQL databases, the features of MongoDB)2nd, MongoDB installation configuration (MongoDB

1. Transaction processing and concurrency1.1. Basic knowledge and related concepts1) All table types can use locks, but only InnoDB and BDB have built-in transactional functionality.2) Start the transaction using begin, use commit to end the

Creating tables: CREATE TABLE TableName(Cloume1name type (not NULL) (DEFAULT ...),//parentheses represent optional...,...//no comma at the end)；Type: char (i), varchar (i), int, date, datetime, Blob,dec (i, J)char (i) differs from varchar (i): char

Why is NoSQLpresent? With the development of the Internet, when we turn a server into two servers, when we start to set up data backup, when we need to add a buffer layer, to adjust all the queries, put more hardware.Finally, you need to slice the

We know MySQL we need to set a default user name and password for the database during installation. MongoDB It's no exception, but MongoDB The default is not set access restrictions, do not need to enter the user name and password can be accessed,

Recently in the Hugh paternity leave, time is more fragmented, ready to see 2 of books enriched, one is "MyBatis: Technical Principles and practice", one is "RABBITMQ combat: efficient deployment of distributed Message Queuing, in order to deepen

1. Transaction processing and Concurrency 1.1. Basic knowledge and related concepts1) All table types can use locks, but only InnoDB and BDB have built-in transactional functionality.2) Start the transaction using begin, use commit to end the

before doing the student information management system and the computer room charge system,forSQLthe problem of injection is already commonplace,but there's no real, vivid understanding of the image.SQLWhat the hell is injected?.It was not until

DDL statementsDDL is the abbreviation of the data definition language, in simple terms, is the creation, deletion, modification of objects inside the database and other operations of the language. The biggest difference between it and DML (data

In the Last post, the small part of the main simple introduction of some of the basic knowledge of EF, which, small dragonfly water of Modelfirst and Dbfirst,modelfirst first design entities, and then based on the model database generation, Dbfirst

One, MySQL storage engine1.1 What storage engines are availableThe MySQL storage engine includes the engine that handles transaction security tables and the engine that handles non-transactional security tables. 1

1. What is Sqliteopenhelper?It is literally meaning: The tool class that helps to open sqlitedatabase.2.SQLiteOpenHelper function?Mainly: some operations in 1.onCreate () to help initialize the database. such as building tables, etc. 2. In

MyISAM is the default database engine for MySQL (prior to version 5.5), which was improved by the early ISAM (Indexed sequential access method: Indexed sequential access methods). Although performance is excellent, there is one drawback: Transaction

Linux route command in layman's and actual case explaininghttp://blog.51cto.com/oldboy/1119453-route command in layman's use guidehttp://blog.51cto.com/oldboy/974194Video commentary of this blog post published: http://oldboy.blog.51cto.com/2561410/11

This article from: http://www.ibm.com/developerworks/cn/web/1207_wangqf_jsthis/This in the JavaScript languageBecause of the nature of its run-time bindings, this meaning in JavaScript is much richer, and it can be a global object, the current

In this summary, we focus on the principle and design idea of atomic operation.Because of the locking mechanism in the next section, the concept of locking is introduced appropriately in this section.In the Java Concurrency in practice, this defines

Transferred from: http://nfer-zhuang.iteye.com/blog/1752387 　　 I. Description above we have made a general description of the ACP android.mk file, so that we have a preliminary understanding of the Android.mk file, below we will focus on the first

Original linkIn the first-in-one article, I've probably introduced how Rxjava is used. I'll show you how to use Rxjava in Android.RxandroidRxandroid is an extension of Rxjava for Android platforms. It contains tools that simplify the development of