# Author Archives

## Data Algebra 0.9.0 Release

I am pleased to announce the 0.9.0 release of the data algebra. The data algebra is realization of the Codd relational algebra for data in written in terms of Python method chaining. It allows the concise clear specification of useful data transforms. Some examples can be found here. Benefits include […]

## How to Compare Two Tables Using the Data Algebra

I would like to share another quick tutorial on some aspects of the data algebra, this time using the example of comparing two tables. Please check it out here.

## Using the data algebra for Statistics and Data Science

I have a new intermediate introduction on the data algebra up here: Using the data algebra for Statistics and Data Science. The data algebra is a tool for data processing in Python which is implemented on top of any of Pandas, Google BigQuery, PostgreSQL, MySQL, Spark, and SQLite. It allows […]

## I think Pandas may have “lost the plot.”

I’ve thought of Pandas as in-memory column oriented data structure with reasonable performance. If I need high performance or scale, I can move to a database. I like Pandas, and thank the authors and maintainers for their efforts. Now I kind of wonder what Pandas is, or what it wants […]

## Back to Teaching

Back to teaching. For a few years we’ve been running a data science intensive at for a really neat FAAMG company. The idea is to give engineers some hands on live workbook time using methods varying from linear regression, xgboost, to deep neural networks. Learning how participants progress and internalize […]

## My opinion on “5” == 5

Every programmer should have an opinion on what the outcomes of the expressions like “5” == 5 should be, and perhaps even a guess as to what the answer is in their most familiar programming language. In my opinion SQL gets it right. For example, we get the following in […]

## Using WITH For Neater SQL

I’d like to work an example of using SQL WITH Common Table Expressions to produce more legible SQL.

## data_algebra 0.7.0 What is New

I’ve been tinkering a lot recently with the data_algebra, and just released version 0.7.0 to PyPi. In this note I’ll touch on what the data algebra is, what the new features are, and my plans going forward.