J2WEB course design example
I found a good article about database query display error: Analysis of mysql coding errors.
And then I have a crack free version navicat . extraction code: dv6k
Project Name: xixijiaxiang online e-book City
Project background: (if I think about it myself, I won ...
Posted by brucensal on Mon, 15 Jun 2020 07:23:16 +0200
Enterprise Actual LNMP High Performance Server_phpMyAdmin deployment
In LNMP WEB architecture, Nginx is a high performance WEB server and cannot process PHP itself. When receiving HTTP Request requests from client browsers, Nginx server responds to and processes WEB requests. Static resource CSS, pictures, videos, TXT and other static file req ...
Posted by jumphopper on Sun, 14 Jun 2020 18:20:40 +0200
Introducing pagehelper dependency
application.yml Medium configuration
Test paging query interface
application.yml Configuration of pagehelper in
If you use mybatis to write paging query, it's troublesome. You need to write the select ...
Posted by dicamille on Sun, 14 Jun 2020 09:01:08 +0200
@Configuration configure spring and start the spring container
@Configuration is used to define the configuration class, which is labeled on the class, which is equivalent to < beans > in the xml configuration file of spring. Its function is to configure the spring container (application context)
Posted by lyealain on Sun, 14 Jun 2020 07:17:49 +0200
Chapter 5 of "Introduction to Flask": learning Flask Sqlalchemy is enough. Don't write too many
According to my personal understanding, database is a tool to store data and the direct relationship between data and data. No matter the complexity or size of the data it stores, it has no ess ...
Posted by parse-error on Sun, 14 Jun 2020 05:53:41 +0200
1, Why open slow query
Most of the reasons for the poor query performance are the large amount of data. To start the slow query of mysql and record the SQL statements that take a long time to query in the log is conducive to our better position and optimization.
2, Several common reasons for the ...
MySQL database backup can be divided into logical backup and physical backup. The logical backup tools are mysqldump and the physical backup tools are xtrabackup. The two backup methods have their own advantages and disadvantages
Support hot backup and incremental backup, requ ...
[Summary] For mysql primary and standby instances, seconds_behind_master is an important parameter to measure the delay between master and slave.Seconds_can be obtained by executing "show slave status;" on slaveBehind_The value of master.
For mysql primary and standby instances, seconds_behind_master is an impor ...
Posted by heldenbrau on Fri, 12 Jun 2020 06:20:43 +0200
With the wide application of NOSQL database, the extensible storage mode also has a good support in relational database. A new data type, JSON, has been added in MySQL 5.7
JSON data type meaning
In fact, without the support of JSON data type, we can save the data in this format by varchar type or text type, but why do we need to specifica ...
Posted by poppy on Wed, 10 Jun 2020 08:47:33 +0200