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MySQL operation guide using UNION and LIMIT

So, I have this problem at hand. I have to get multiple records from different tables using inner join and usi...

From [MySQLdiscussion group] 2023-09-08 12:39:10 0  1  624

mysql procedures should only return status to unix scripts

I have a mysql program that has out parameters and some print statements for debugging. I'm calling this proce...

From [MySQLdiscussion group] 2023-09-08 09:44:26 0  2  782

MySQL - Simple query sometimes suffers from infinite loop and increasing number of rows_fetched

I've been trying to figure out for the past 4 weeks why queries are executing intermittently forever on Docker...

From [MySQLdiscussion group] 2023-09-08 09:20:56 0  1  769

Postal code validation does not work for postal code ranges

Trying to create postcode validation in woocommerce. I can't get my query to look at range intervals like 1000...

From [MySQLdiscussion group] 2023-09-08 09:16:07 0  1  756

Why MySQL slows down without specifying an index

I'm trying to optimize a SQL query but I'd like to know how to do it correctly. SELECTr0_.*FROMrider0_useindex...

From [MySQLdiscussion group] 2023-09-08 00:38:24 0  1  755

The "where" statement in MySQL will interrupt the full connection

考慮以下表格：createtable`t1`(`date`date,`value`int);createtable`t2`(`date`date,`value`int);insertinto`t1`(`date`,`va...

From [MySQLdiscussion group] 2023-09-07 21:23:58 0  2  731

MYSQL: Best choice for accent-sensitive but case-insensitive UTF settings

For example, ?ν or ?ν are the same but should be distinguished from ?ν/?ν. I tried utf8_bin which seems to be ...

From [MySQLdiscussion group] 2023-09-07 20:59:31 0  1  949

How to use JDBC in Java to implement continuous updates of the database server without increasing RAM consumption

I'm writing a fighting game in JavaFX, using JDBC to update information into a MySQL database. Most tasks that...

From [MySQLdiscussion group] 2023-09-07 20:10:29 0  1  1005

How to calculate the difference between two SQL queries

I want to do subtraction between entotalitem and exotalitem, the query I am using is to retrieve data from the...

From [MySQLdiscussion group] 2023-09-07 20:06:33 0  1  758

SQL: Need aggregated pivot view with multiple fields with boolean values

Given: I have a source table that contains different attributes of footwear in multiple boolean fields, the va...

From [MySQLdiscussion group] 2023-09-07 19:47:09 0  1  734

Use multiple tables for MySQL joins and avoid using subquery methods

My query in fiddle is as follows. select*fromnotificationwherestatus=0and(notif_idin(selectnotif_idfromnotif_u...

From [MySQLdiscussion group] 2023-09-07 17:38:48 0  2  596

The Chinese translation of MySQL MIN() + 1 row is "MySQL minimum value() + 1 row"

I'm running a SELECT query to get data from MySQL SELECTMIN(datetime)ascreated,MAX(datetime)asupdated,COUNT(CA...

From [MySQLdiscussion group] 2023-09-07 16:31:45 0  1  558

Calculate column date values: Use variables and other columns to perform date offset calculations

I have a project management table with 1000 tasks/records, each task/record has a dynamic starting_date and en...

From [MySQLdiscussion group] 2023-09-07 16:31:02 0  1  676

Generating Unique 13-Digit Numbers: Methods and Techniques in MySQL

Hi everyone, I've been trying all day to generate unique 13 numbers for existing products in my database. Ever...

From [MySQLdiscussion group] 2023-09-07 15:50:30 0  1  617

SQL method to query rows based on parameters and join table

I have the following GET endpoint in my Ruby project: /endpoint/:special_param I have a database with 2 tables...

From [MySQLdiscussion group] 2023-09-07 15:32:10 0  1  676