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How to improve select performance on a 15 million row MyISAM table converted to InnoDB

MySQL version 8.0.32-0ubuntu0.20.04.2 I'm trying to improve SELECT performance rather than circumvent performi...

From [MySQLdiscussion group] 2023-09-06 19:30:08 0  1  562

Will changing the MYSQL table engine from MYISAM to INNODB cause data corruption?

I have a simple question. I have a mysql database. I have 2 tables using MYISAM that I want to change to INNOD...

From [MySQLdiscussion group] 2023-09-06 18:42:42 0  1  556

SQL - ORDER BY sorting is incorrect

I have a question, it works fine. In the last step, I want it to sort the entire table DESC based on the numbe...

From [MySQLdiscussion group] 2023-09-06 18:42:46 0  2  672

Execute all SQL queries in yii2 migration

I'm trying to do a migration that executes multiple queries on different tables simultaneously $sql='';$sql.=&...

From [MySQLdiscussion group] 2023-09-06 18:08:57 0  1  741

How to access MysqlServer on my PC via a PHP script on a remote hosting server

I have installed MysqlServer and MysqlWorkbench on my computer. The server is running well (green). Now I have...

From [MySQLdiscussion group] 2023-09-06 17:40:54 0  1  679

How to get value from Encode json data on php page

I try to get the object from the controller and when I console.log(response) it correctly displays the values ...

From [MySQLdiscussion group] 2023-09-06 17:14:28 0  2  694

The title is rewritten as: Dynamizing SQL queries

I have the following SQL query and was wondering if I could make the SUM() part of it dynamic so that I don't ...

From [MySQLdiscussion group] 2023-09-06 15:20:57 0  1  704

Rewrite the title as: Concatenate JSON array to string in MySQL

I'm looking for a way to concatenate JSON arrays into delimited strings in MySQL. Below is an example using th...

From [MySQLdiscussion group] 2023-09-06 14:59:38 0  1  820

mysql search value from nested json

I am trying to search userId value 22 from nested json in mysql column my json is '{"data":[{"c...

From [MySQLdiscussion group] 2023-09-06 14:49:48 0  1  655

MySQL server cannot apply modifications in my.cnf file

I have installed mysql server and mysql client using bundles on Centos7. The port of mysql server is shown as ...

From [MySQLdiscussion group] 2023-09-06 14:28:28 0  1  654

What is the correct way to join two complex mysql select statements?

I can get two lists out of my table. All units for each student in each cohort are shown. The other shows whet...

From [MySQLdiscussion group] 2023-09-06 14:09:54 0  1  680

How to enable remote access to mysql docker's root user in docker-compose file?

Currently I'm using the following simple YAML file to start a MySQL server version:'3.3'services:db:image:mysq...

From [MySQLdiscussion group] 2023-09-06 13:10:11 0  1  847

Ensure the uniqueness of the incremental value of Sequelize

I am currently using Sequelize's increment() function to increment a column of order number values. For exampl...

From [MySQLdiscussion group] 2023-09-06 12:35:12 0  1  600

For the same col3 value in mySQL, how to get all rows if col1 of one row is equal to one value and col2 of the same row or different row is equal to another value?

RC1C2C3C4R11 a B1R21BC2R31CD3R42 a D1R53 a D1R63DX2 I have a table my_table in mySQL which contains the above ...

From [MySQLdiscussion group] 2023-09-06 12:23:13 0  1  603

Rewrite the title as: SQL grouping of columns using reversed values

Let's say I have a table like this: +---+---+---+---+---+|G1|G2|G3|G4|V|+---+---+ ---+---+---+|A|B|C|D|2||E|F|...

From [MySQLdiscussion group] 2023-09-06 11:53:34 0  1  823