Commonly used select statements to view mysql system parameters

The buffer pool size 393215 this is a page, not a byte. To see the buffer pool size in GB, run the following command: SELECT FORMAT(BufferPoolPages*PageSize/POWER(1024,3),2) BufferPoolDataGB FROM (SELECT variable_value BufferPoolPages FROM information_schema.global_status WHERE variable_name = 'Innodb_buffer_pool_pages_tota ...

Posted by freakstyle on Tue, 31 Mar 2020 17:39:59 -0700

Detailed examination papers

Because of the data problem in the database, it is not as good to take blank pages as the prototype image on the board: Body Code: <div *ngFor="let q of qt.questionMainList; let i=index" [ngSwitch]="qt.questionTypeId"> <div *ngFor="let qtl of questionTypeList; let k=index"> <div *ngIf="qt.quest ...

Posted by tommyrulez on Tue, 31 Mar 2020 14:54:18 -0700

Android adds pictures and alarm clocks to the database and displays them with listview 2

Android adds pictures and alarm clocks to the database and displays them with listview 2 Novice on the road, please give me more advice Continue last time, the teacher proposed to add two more alarm clocks. Although it was not satisfactory, it also made Because it's not so hard for a novice to simplify his intelligen ...

Posted by BAM1979 on Tue, 31 Mar 2020 14:33:17 -0700

Mysql Event scheduling history

Mysql Event scheduling history The current mysql version does not have Event execution history information. In order to check whether the Event is executed normally and the execution result conveniently, the following two steps can be used:   1, Create job execution Event history table CREATE TABLE `mysql`.`t_event ...

Posted by Danicek on Tue, 31 Mar 2020 11:51:26 -0700

SQL basic bullet 2

Prepare data: – create a "shop" Database CREATE DATABASE shop CHARSET=utf8; – use "Jingdong" Database use shop; – create a goods data table Insert data (if you don't understand the meaning of each field name, read the insert data below, you will understand it, but you still ...

Posted by v00d00 on Tue, 31 Mar 2020 11:28:01 -0700

GitLab backup and recovery

Because the company changed the server service provider and the server was migrated to another service provider, today we will simulate the operation of online migration of gitlab git-A IP:192.168.82.184 git-B IP:192.168.82.184 If the version number is the same, the backup migration will fail   Step 1.gitlab backup gita-A #c ...

Posted by vichiq on Tue, 31 Mar 2020 10:54:28 -0700

HPU timetable software of Henan University of Technology

HpuTimetableAPI Background open interface of [HPU timetable] software It includes the whole course library of the second semester 2017-2018 of Henan University of technology 23 colleges, 901 classes, 5647 courses, 20241 course records Rubbing class function Sharing courses Scan code import course management Course library ma ...

Posted by solus on Tue, 31 Mar 2020 08:20:54 -0700

Simple configuration and database connection of NodeJS build project

Simple configuration and database connection of NodeJS build project The main contents are as follows: Load exprss module Create app app Load template processing Set up static file hosting Load database module Blog offline Processing post requests Cookie settings Load exprss module var express = require('express ...

Posted by keevitaja on Tue, 31 Mar 2020 06:57:39 -0700

Unit testing with JUnit in Intellij

These days, I'm groping for Intellij idea to record some small knowledge points. First contact with Intellij and use Hibernate framework to operate mysql database. If you want to use unit test in Intellij, you know that Junit is needed, but it is not found by default. How to solve it? >>First, go to settings an ...

Posted by devx on Tue, 31 Mar 2020 05:54:40 -0700

PyQt5 building library management system (3) -- Design of login page

PyQt5 building library management system (3) -- Design of login page PyQt5 building library management system (3) -- Design of login page Analysis Code: The effect is as follows Analysis The logic of the login page is simple, as follows: -User input student number and password (for security, plus input ...

Posted by swissmant on Tue, 31 Mar 2020 02:03:39 -0700