SQL optimization----million data query optimization

Label:Transfer from http://www.cnblogs.com/qqzy168/p/3233817.html1. Fair use IndexAn index is an important data structure in a database, and its fundamental purpose is to improve query efficiency. Most database products now use the ISAM index

Configuration work after Sybase is installed

Label:1. Configuring Database Parameters Configure Sybase maximum memory used by the database Log in to the Sybase database server with the isql command-line utility, where servername is the Sybase server configured in the

Ubuntu Installation Rabbitmq-server

Label:RABBITMQ is written in Erlang, so we need to install Erlang, install Erlang and install Python and Simplejson, so we'll start with Python:1. Install Python:[PHP]View Plaincopy #wget

GAC (Global Assembly Cache) registers/uninstalls DLLs

Label:When more than one solution is found referencing a DLL, a DLL for. NET is registered with the GAC in order to not duplicate the reference.Gacutil.exe.Remember to open with administrator privilegesStart Menu-microsoft Visual Studio 2015-vs2015

<error>: Cgcontextrestoregstate:invalid context 0x0. If you want to see the backtrace, please set cg_context_show_backtrace environmental variable.

Label:turn from here Error Reason: Set the app's status bar style using the old way, in Info.plist set the view controller-based status bar appearance is no, the default is yes, The general type of iOS6 use this way, ios7,8 is also compatible, but

Random class

Label:Random Class (Java.util)The random algorithm implemented in the random class is pseudo-random, that is, random with rules. At random, the origin of the random algorithm is called the seed number (seed), the number of seeds on the basis of a

CMD to delete, add, modify registry commands

Label:Transferred from: http://www.jb51.net/article/30586.htmoperation parameters of RegeditREGEDIT [/l:system] [/r:user] filename1REGEDIT [/l:system] [/r:user]/C filename2REGEDIT [/l:system] [/r:user]/E filename3 [Regpath]/L:SYSTEM Specifies the

quartz2d image Processing

Label:First of all, thank a maple Leaf summed up such a good article, article source: http://www.cnblogs.com/smileEvday/archive/2013/05/25/IOSImageEdit.htmlThis article will show you common iOS image processing operations include the following four

MyBatis automatically generate mapping profile information using generator

Label:using MyBatis To configure mapping file comparisons is cumbersome, but there are auto-generated jar tools that facilitate faster development, mainly the use of the tool and the associated configuration. 1. Download Related ResourcesWe need to


Label:Cut is a row-specific data selection commandSynopsisCut [OPTION] ... [FILE] ...OPTION -B is split in bytes and needs attention if it's multibyte. -C is split in characters -D custom delimiter, default to tab -F shows which

The basic concept of object-oriented

Label:OOP Technology manages complex things according to the characteristics of the real world, abstracts them into objects, has its own state and behavior, and accomplishes certain tasks by reacting to the message. This programming method provides

23rd book: "Chess and Life"

Label:23rd book: "Chess and Life"Personally like to play chess, bridge, as a programmer, has always wanted to write a Chinese chess engine, so very early attention to this book. Life, such as chess, need to make a lot of decisions and choices in

Reading notes: "How to read a book"

Label:Reading notes: "How to read a book"The 2012 annual goal is to read 12 books, after reading 11 books more and more feel the book is the best way to improve the mind, but also regrets that they have read it technology books more, and other

DNS-related concepts

Tags: how DNA worksDNS: Domain name resolution common BIND domain name server (domain Service)Host Name: www.magedu.comDomain Name: magedu.com (magedu This field is saved under. com)FQDN: Fully Qualified domain nameDNS: Name resolution (behind the

Cryptographic decryption, OpenSSL, private CA creation Process

Tags: openssl, RSA, MD5First, encryption and decryptionEncryption technology is the technology of encoding and decoding information, encoding is the original readable information (also known as plaintext) translated into code form (also known as

17th: The future of the Code

Label:17th: The future of the CodeTo go to the southwest on business, but from their shelves and the Kindle can not find interesting books, pro departure to the old sun room to find a lap, selected the "Code of the Future" this book. There are

Difference between service life cycle and activity life cycle

Label:The life cycle of a componentThe application component has a lifecycle from the Android instance that responds to intent to the instance being destroyed. During this period, they may be effective or ineffective, and may not be visible to users

Object Oriented thinking

Label: Object-oriented thought editing Object-oriented programming language must have a linguistic component that describes the object and its relationship to each other. These programming languages can be summed up in the

A basic XML syntax

Label:I. XML BASIC syntax1.1 XML Introduction1) XML is Extensible Markup Language (extensible Markup Language).2) XML is a software and hardware-independent information transfer tool.3) XML is in the form of text in a text file, usually the suffix

Common MIME Types (MIME type settings for Flv,mp4)

Label:Maybe you're wondering why I uploaded an flv or MP4 file to the server and entered the correct address through the HTTP protocol to access the always "can't find this page" 404 error? This indicates that the MP4 format file is not recognized

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