Simply learn xml and look at it on w3school.
Looking at the contrast and difference between xml and Json, this blog is still very detailed:
Knowing this problem is also good, learn to rise posture:
Now let' ...
Posted on Tue, 25 Jun 2019 17:30:29 -0700 by mingwww
Four Ways of Array Loop Traversal1. Traverse arrays using for loopsconut($arr); used to count the number of elements in an array.For loops can only be used for traversal, pure index arrays!!!If there are associative arrays, count counts the total number of the two arrays, and traverses the mixed arrays with a for loop, causing the arrays to cro ...
Posted on Tue, 25 Jun 2019 15:03:22 -0700 by psychomossel
Original: http://nullwy.me/2019/06/mysq...If you find my article useful, feel free to appreciate it
MySQL 5.7.8 started providing native support for JSON in August 2015 [doc1, doc2 ].MySQL support for JSON has come to life.Beginning in 2009 NoSQL Gradually, NoSQL such as key value pair database, document database, column family database, graph ...
Posted on Tue, 25 Jun 2019 13:30:50 -0700 by ahmadmunif
SQL database index
Deep Resolution Address: http://www.cnblogs.com/hustcat/archive/2009/10/28/1591648.html
- Cluster index can be divided into clustering index and non-clustering index. Cluster index is ordered according to the physical location of data storage, but not clustering index. Cluster index can improve the speed of multi-line retr ...
Posted on Tue, 25 Jun 2019 13:06:11 -0700 by phanh
What is a service provider framework? Service Provider Framework refers to a system in which multiple service providers implement a service, which provides multiple implementations for service providers on the client side, and
Decouple them from multiple implementations. Looking at this definition, I am confused. So let's take a l ...
Posted on Tue, 25 Jun 2019 10:31:52 -0700 by PHPist
Following is the translation of the last article: Use the'In place'method to upgrade directly from 5.0 to 5.7 Here I record the process of my practice.1. Environmental preparation Database A Version: 5.1 Character set: latin1 Engine: MyISAM &n ...
Posted on Sun, 23 Jun 2019 15:22:40 -0700 by Snooble
vsftpdVsftpd is "very secure FTP daemon", and security is one of its greatest features. Let's look at the fast configuration of vsftpd.The main configuration files of vsftpd are:/etc/pam.d/vsftpd /etc/vsftpd /etc/vsftpd/ftpuse ...
Posted on Sun, 23 Jun 2019 15:06:49 -0700 by gple
1.data base Timely backup of working scripts: (date and time as the name of the compressed file, decompression is sql script)
2. Backup output path:
3. Order to carry out planned tasks:
# Crontab-e Opens the Scheduled Task Editor
# Add the following (specified to start backup ...
Posted on Fri, 21 Jun 2019 11:43:47 -0700 by sandy1028
(1) Background introductionBecause the database uses RDS database of Aliyun, when all the reads and writes are on one server, CPU load is higher. Especially in the business period, concurrent access is more, resulting in greater business pressure. After inquiry, master-slave replication can be used, RDS database can only be used for writing, a ...
Posted on Fri, 21 Jun 2019 11:26:06 -0700 by tabs
In the previous experiment 2.3 - PV & PVC, we bind wordpress+mysql's Deployment to PVC and successfully save mysql's data on the PV storage volume.But mysql as a database application, when horizontal expansion, is a number of independent database instances, data are separated from each other, resulting in inconsistent state between ...
Posted on Thu, 20 Jun 2019 16:27:02 -0700 by Angus