Mysql – SELECT from table based on multiple rows
In mysql, I have a table full of attributes, looking like so: USER_ID ATTR_NAME ATTR_VALUE 1 Name Jess 1 Age 23 1 Sex m 2 Name Jess 2 Age 23 3 Name Ann 3 Sex f (Note that not every…
Mysql – How to Select only UNIQUE rows in SQL
I have a table as in sample below | C1 | C2 | C3 | C4 | r1 | a | b | c | 1 | r2 | a | b | c | 2 | r3 | c…
Mysql – How do I use just the first value that satisfies a condition in my join?
I'm trying to think what the most efficient way to do this is, hopefully you can help. I have two tables, one is for Customer Call data (customer calls in to a customer service number), the other is invoice data.…
MYSQL – What is the average time between the 2 nd and 3 rd email for each individual product on an overall level?
We have 4 tables, to study the email performance of a campaign: Table A contains the campaign name information Table B contains the campaign id delivery performance (who the campaign was sent out to) Table C contains the campaign id…
WordPress – WP Slow search SQL on one of the servers
I have 2 dedicated servers, S1, 24 cores and 128gb RAM, and S2, 8 cores and 64GB RAM. Both server CPUs have multithreading. On S1 I run cPanel and S2 serves only as a DB server( remote ). Both servers…
MySQL – group by non aggregate column alternatives efficiency
Im trying to get my head around the most effective way to achieve intended result. After some reading i realize turning only_full_group_by=off is a bad idea. I have the following data: Table test id task user 1 21 4 2…
Mysql – How would I create a query to find the employee who has mentored more than 2 people
New to MYSQL. I'm trying to create a query that essentially selects employees who have mentored more than 2 people. The mentored_by column uses the SSN of employee's to tell who has mentored who, So you can see that that…
MySQL load data insert, split values to multiple rows
Using the LOAD DATA LOCAL INFILE num column Store every 6 digits How can I parameterize the load command to iterate through the array? Mysql version 8.0.23 In File text id length 1, cnt length 2, num length 500 --------------------…
Table is not creating in MySQL server from Spring JPA
I have written the code. It goes like - Here is my GitHub Repo - https://github.com/SuvamNaskar/spring-learn.git spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:2023/student?createDatabaseIfNotExist=true&useSSL=false spring.datasource.username=root spring.datasource.password=system32 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.data.jpa.repositories.enabled=true spring.jpa.show-sql=true spring.jpa.properties.hibernate.format_sql=true spring.thymeleaf.check-template-location=false spring.jpa.generate-ddl=true spring.jpa.hibernate.ddl-auto=create-drop spring.jpa.defer-datasource-initialization= true spring.jpa.open-in-view=false logging.level.org.hibernate.SQL=DEBUG logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl This is my application.properties file. I have tried…
Laravel Eloquent Query for Double Entry Journal
I have a table journals having columns transaction_id, type(receipt or payment), debit and credit columns for amount, account_id relation with accounts table the records can be multiple receipt or payment entries, and an opposite entry to record sum of these…