Advantages of MongoDB over RDBMS
Less Schemas - MongoDB is a document database where a collection contains different documents.The number of fields, content, and document size may vary between documents.
The structure of a single object is clear.
There are no complex joins.
In-depth query capabilities.MongoDB supports dynamic querying of docum ...
Posted on Thu, 14 May 2020 12:58:34 -0400 by thinkgfx
Recently, bloggers are preparing for written examinations and interviews for data analysis posts, and the focus of which is SQL. I heard that after practicing these 50 questions, I'm not afraid to tear SQL on the spot, so I'll practice quickly! Heroes, you will not be afraid of anything after pr ...
Posted on Mon, 16 Mar 2020 01:46:09 -0400 by porto88
1. Introduction to ide tools (Navicat)
In order to facilitate the test, use the IDE tool, Navicat, which is essentially a socket client, a visual tool for connecting mysql server, and a graphical interface version. The difference between it and using the command line directly is similar to the difference between linux and windows.
Navicat downl ...
Posted on Tue, 03 Dec 2019 13:07:45 -0500 by 9902468
Mac version Navicat Premium 12 v220.127.116.11 official website download address:
64 in English http://download.navicat.com/download/navicat120_premium_en.dmg
64 bits of simplified Chinese http://download.navicat.com/download/navicat120_premium_cs.dmg
Download on the official website is very slow, so use this directly.
Posted on Wed, 02 Oct 2019 12:37:21 -0400 by kslagdive
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mycat is one data base Middleware, based on Ali's open source cobar products, is developed by several aspiring people who work together to complete and open source. Provid ...
Posted on Sat, 20 Apr 2019 15:45:33 -0400 by pesale86
Recent research on Express framework, and then to Yeoman It picks up an Express project to play with, based on MVC ideas.
It took me a long time to see data access there, so I spent a little time studying it. Sequelize This is an ORM for nodejs. Before that, I was familiar with Microsoft's father's Microsoft Entity Framework, or climbed a litt ...
Posted on Tue, 16 Apr 2019 23:24:32 -0400 by JChilds
In the first sentence, export all the data from January this year to facilitate auditors'checking. Then all the data are integrated, and every 100w items are exported into a separate file. The line contents are organized according to the text format of csv.
In a few simple sentences, there are many pits in it.
Difficulties in real ...
Posted on Sun, 14 Apr 2019 15:21:32 -0400 by mator
I started with a notebook to write code, and then I used a lab computer to write code. I wanted to migrate the data from the notebook to the lab computer. As a result, I just copied the names of the relevant databases. The tables can be seen in the navicat (mysql graphical interface), but when I opened it, ...
Posted on Thu, 20 Dec 2018 02:36:05 -0500 by liljim