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Nested queries to reference fields in parent queries

簡化示例：selectticket_id,`number`as'ticketnumber',(SELECTcount(*)fromost_thread_entryjoinost_threadonost_thread_en...

From [MySQLdiscussion group] 2024-02-04 08:48:42 0  1  556

How to get list of users using only one value in multiple rows - MySQL

I have a payment schedule. It has a column named user_id and payment_type. For each payment, users can have mu...

From [MySQLdiscussion group] 2024-02-03 23:19:38 0  1  491

Remove duplicate rows when doing self join in SQL

I am trying to remove duplicate values ??from rows based on a join on the same table, but cannot remove a valu...

From [MySQLdiscussion group] 2024-02-03 22:11:59 0  1  613

MySQL trigger not working after delete update

Sorry to ask this question again as there is a lot on the forum about this issue. But I hope my problem is dif...

From [MySQLdiscussion group] 2024-02-03 22:07:06 0  1  486

Why is DESC command query slow on MariaDB

I have a query running against Maridb, when we query in ASC order, the optimizer checks less number of records...

From [MySQLdiscussion group] 2024-02-03 21:29:17 0  1  634

Is it possible to create a separate database for each user on AWS RDS for MYSQL?

I'm creating an app that every business will have; the owner, who is the user of some-business-name database, ...

From [MySQLdiscussion group] 2024-02-03 20:40:31 0  1  581

Get number of players from mysql

I need to get the number of users who have rank=player so far I have tried selectcount(*)ascount_playersfromus...

From [MySQLdiscussion group] 2024-02-03 20:10:04 0  1  504

Inner join to the same table using filter position

Thanks for helping me, I'm still learning SQL. I have a main table called JEDI and I'm trying to get specific ...

From [MySQLdiscussion group] 2024-02-03 18:57:36 0  2  619

Store the position of the draggable DIV in an HTML table and save it to a MySQL database

I'm wondering if/how I can store the position I moved the draggable div to on the table, so when the page relo...

From [MySQLdiscussion group] 2024-02-03 18:37:10 0  1  516

Golang Gorm scope broken after upgrading from v1 to v2

I'm using Gormv1. My pagination range works fine: funcPaginate(entityBaseEntity,p*Pagination)func(db*gorm.DB)*...

From [MySQLdiscussion group] 2024-02-03 17:53:53 0  1  723

Error installing mysqlclient in django project on cPanel

Requirements.txt包含：asgiref==3.4.1Django==3.2.9django-isbn-field==0.5.3mysql-connector-pythonmysqlclientphonenu...

From [MySQLdiscussion group] 2024-02-03 17:57:03 0  1  566

In Node.js, Inquirer exits before I make a selection

I'm trying to write a command line application that uses an interrogator to display and ultimately update a my...

From [MySQLdiscussion group] 2024-02-03 17:05:20 0  1  484

Is there a way to optimize ManyToOne relationships using JPA?

I have an employee who works in multiple departments. I have OneToMany relationship in Employee and ManyToOne ...

From [MySQLdiscussion group] 2024-01-29 13:09:59 0  1  567

Mysql bash database name is wrong when database exists?

I'm currently scripting a migration using bash scripting. When I try to open the database via a variable in a ...

From [MySQLdiscussion group] 2024-01-29 12:27:49 0  1  580

Query to calculate the average of each quarter

I'm new to MySQL and need your help figuring out a query so that I can calculate the average for each quarter....

From [MySQLdiscussion group] 2024-01-29 11:58:00 0  1  537