what is mongo database

1.0 prerequisites Objective: To have a conceptual understanding of what a memory-type database is .? Read the following five blog posts about the redis series. This ID will be added one after another. This ID redis Series 1. 0: first, this is your official redis Website: Http://www.redis.cn/ 1.1 you need to downloa

Overview About PEAR,PECL These two things, beginner PHP when you know, but it seems to use people rarely add to the previous is also in Windows to do development, so do not know much, now turn to the Mac, the two things thoroughly to find out. What is Pear Pear's full name is PHP Extension and application Repository

More and more friends asked in QQ or QQ groups, "What Do website art engineers need?" and "How do they learn webpage art "...... Or you may be new to this course. I don't want to answer the same question again. I wrote this article to talk about what a webpage artist is and what a webpage artist

link to the newly generated Web page. At present, this technology is not widely used. What is a dead link. Simply put, the dead link refers to a link that was normal and later invalidated. When a dead link sends a request, the server returns a 404 error page. There are dead chains in these cases: L Dynamic links become dead links under conditions that the

Tags: style blog http color os using Java strong ARSuitable for readers: for MongoDB there is not yet a holistic understanding of beginners. Here is a brief introduction to this ID: Ii. introduction of MongoDB MongoDB is a high-performance, open-source, modeless document-based database that

to help you. 1. For PHP programmers, the main requirement is to write the controller layer in MVC. This is the main job. 2. If a new table is built, write the model layer (data interaction) layer 3. General company static page (HTML+CSS) by the front-end personnel responsible, if not, that is you write ... 4. Some JS

First of all, the so-called SQL dynamic and static, refers to when SQL statements are compiled and executed, both are used in SQL embedded programming, which is referred to as embedded refers to the SQL statement embedded in the high-level language, rather than the type of microcontroller embedded programming.In a high-level language, if an SQL statement is embedded, and the main structure of the SQL statem

What is PEAR? What is PECL? Two confusing concepts in PHP, pearpecl. What is PEAR? What is PECL? In PHP, there are two confusing concepts. p

This article mainly introduces what is PEAR? What is PECL? Two confusing concepts in PHP are explained. This article explains their differences in a concise language. For more information, see Overview PEAR and PECL are two things you know when you are new to PHP, but few people seem to be familiar with it. In addi

web, you need to develop a php type, and then you must at least understand the http protocol. If tianyao is not good, you 'd better develop a network protocol, see the application layer such as http and ftp from the hardware cable. only when you understand the network can you understand how the web works. For example, the php background language is used for http protocol (of course, apache

prevent inconsistent data. Database at design time, the primary key plays a very important role.The primary key guarantees that the record is unique and the primary key domain is not empty, and the database management system automatically generates a unique index for the primary key, so the primary key

is not used For example, a table with a very small amount of data Under what circumstances is it not recommended to use an index?1) fields with poor data uniqueness (only a few values in a field) do not use the index For example, gender, there are only two possible data. This means that the index has less than two tree levels and