Sequel is a simple, flexible, and powerful SQL database access toolkit for Ruby. Sequel provides thread safety, connection pooling and a concise DSL for constructing SQL queries and table schemas.

DuckDB is an amazing tool with deep integration with Python and R, but sometimes you just need data in Excel. xlDuckDb allows DuckDB SQL to be run within Excel. Query results are returned as regular ...

Joins can be a challenging concept to grasp in data science, but with the right examples and explanations, they can become much clearer. Let's dive into the concept of joins by using a different ...

In this blog, we will take a deep dive into subqueries and joins in SQL. Subqueries and joins are two important concepts in SQL, the standard programming language for managing and manipulating ...

See how to join two data sets by one or more common columns using base R’s merge function, dplyr join functions, and the speedy data.table package. R has a number of quick, elegant ways to join data ...

How do I do that in data.table? Find code for dozens of data tasks in this searchable cheat sheet of R data.table and Tidyverse code. Speed. Concise syntax. Backwards compatibility. But especially ...

The first thing to say is that if you don’t specify a join algorithm in the sixth parameter of Table.Join (it’s an optional parameter), Power Query will try to decide which algorithm to use based on ...

Merging (or, in SQL terms, joining) tables in Power Query is a common cause of refresh performance problems. I’ve often wondered whether there’s anything you can do to optimise the performance of ...