group-by

📝 **Title: Counting and Grouping Data in MongoDB: Simplifying with Aggregate Functions** Introduction: 👋 Hey tech enthusiasts! Are you having trouble counting and grouping data in MongoDB? You're not alone! In this blog post, we'll tackle a common quest

# How to query as GROUP BY in Django? 🤔 Are you struggling with grouping your Django query results just like you would with the `GROUP BY` clause in SQL? Don't worry, you're not alone! Many Django developers face this challenge. In this blog post, we wil

👋 Hey there! Are you struggling to find the user_id that has qualifying data on multiple rows in the wp_usermeta table? 🤔 Don't worry, I'm here to help you out! First, let's understand the problem. You mentioned that you have a MySQL query, but it's no

📝 **Title: "MySQL Order before Group by: Finding the Latest Post per Author Made Easy"** 👋 Hey there, tech wizards! 🧙‍♂️ Are you struggling with MySQL's order before group by issue when it comes to finding the latest post per author? We get it, it can

📝 **MySQL: SELECT DISTINCT vs GROUP BY - Which is Faster?** If you're working with MySQL and need to retrieve unique values from a specific column, you might be wondering: should I use `SELECT DISTINCT` or `GROUP BY`? Let's dive into this problem to find

# Calculating Relative Frequencies / Proportions with dplyr Ever wondered how to calculate the relative frequencies or proportions of different values within each group using the dplyr package in R? 🤔 Let's delve into this question using the mtcars data

# Understanding the SQL Clause "GROUP BY 1" 📝 **Introduction** Imagine receiving a SQL query where the `GROUP BY` clause is stated as `GROUP BY 1`. 🤔 It might look like a typo at first glance, as no column is assigned the alias `1`. But is it really? In

👋 Hey there! Are you struggling with the "Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column" error in MySQL? We've got you covered! 😎 📝 In this blog post, we will address this common issue and provide you with eas

# Error: MySQL 'only_full_group_by' Error So, you upgraded your system and installed MySQL 5.7.9 for your web application. But now, when you try to execute a query that used to work fine in older versions, you're faced with the dreaded `only_full_group_by