Zach Musgrave

March 20, 2020

Dolt is Git for data . It's a SQL database that lets you branch, merge, and fork your data just like you would a Git repository. In previous blog posts we announced how you can use special system tables to query the history of your database ...

Tim Sehn

March 18, 2020

Here at DoltHub , we've been working on COVID-19 data since February 5, 2020. First, we started importing John Hopkins data and then we worked on assembling the largest open, regularly-updated set of case details from Singapore, Hong Kong an...

Tim Sehn

March 16, 2020

As part of our effort to track data related to the Novel Coronavirus (COVID-19) , we wanted to scrape a JavaScript-enabled website on Coronavirus from Hong Kong . Moreover, you'll notice that the website from Hong Kong uses lazy loading based o...

Tim Sehn

March 12, 2020

On Saturday, February 29, this transpired in our company chat room: A project was born. We had time series data for confirmed cases, deaths, and recoveries segmented by location sourced from John Hopkins but we d...

Matt Jesuele

March 11, 2020

In our introductory article for this series, we took a high-level look at the technology stack and architecture behind DoltHub , the online home for Dolt data repositories. In this article, we'll delve a little deeper and discuss how the pi...

Brian Hendriks

March 7, 2020

In this blog post I want to give an introduction to some core concepts used to implement fast querying of databases. These techniques were implemented in Dolt and produced significant performance improvements. Database internals The B-Tr...

Tim Sehn

March 6, 2020

An updated version of this blog was published in September 2024. So you want Git for Data? 2024 Edition . People have been asking for a Git and GitHub for data for a while. That thread on Stack Exchange is almost seven years old and...

Brian Hendriks

March 5, 2020

In the first part of this two part blog I covered NOAA's "Global Hourly Surface Data" dataset and how it is modeled in Dolt . Dolt is git for data, and for this dataset we model a day of observations as a single commit in the commit grap...

Brian Hendriks

March 2, 2020

The National Oceanic and Atmospheric Administration, NOAA, publishes weather measurements taken from stations around the world. It started in 1901 with a handful of stations, and there are more than 35,000 stations today. Most of these stations…

Zach Musgrave

February 28, 2020

Dolt is Git for data. We built Dolt to help teams collaborate on data sets using the forking, branching, and merging workflows that Git popularized. These workflows are what enable software engineers to collaborate on source code, and they...

Oscar Batori

February 26, 2020

In our previous blog post we examined some freely available licensing tools for open data from Creative Commons. To briefly recap a license specifies the terms under which copyrightable material is made available for public access, sharply dis...

Oscar Batori

February 24, 2020

Introduction Dolt is a data format. DoltHub is a collaboration platform for data stored in the Dolt format. When sharing copyrighted content the terms of that sharing are governed by a license. In this post we highlight some common licen...

Tim Sehn

February 23, 2020

John Hopkins University Center for Systems Science and Engineering began collecting, tabulating, and publishing Novel Coronavirus (COVID-19) data on January 31, 2020. We started importing this dataset into Dolt on February 5, 2020. This blo...

Matt Jesuele

February 20, 2020

Towards the end of last month, we launched a totally reworked and redesigned version of DoltHub , our web application for hosting and collaborating on Dolt repositories. Now that we've had a little while to iron the kinks out, it seems like...

Oscar Batori

February 17, 2020

Background We are excited to announce the launch of our documentation site . The goal of Dolt and DoltHub is to enable developers and the data community with radically better data infrastructure. High quality documentation should empo...

Zach Musgrave

February 14, 2020

Happy Valentines Day from all of us at DoltHub ! You are the reason we do what we do! In honor of the holiday, we want to talk about how much we love making queries faster. We're going to examine how our...

Katie McCulloch

February 13, 2020

Dolt and DoltHub strive to be the best data distribution platform on the internet. Having documentation versioned alongside data, and a standard, easy way to read the documentation online are features we admire in Git and GitHub. Following ...

Aaron Son

February 10, 2020

Dolt is a SQL database with Git-style versioning and distribution. The most recent releases of Dolt introduced support for SQL views that are stored as part of, and versioned along with, a Dolt repository. This provides a great way for data sets ...

Tim Sehn

February 3, 2020

Dolt is a SQL database with Git-style versioning. In Git the unit of versioning is files. In Dolt, the unit of versioning is SQL tables. Dolt will eventually support 100% of the Git command line and 100% of MySQL SQL. Moreover, anything you can d...

Brian Hendriks

February 3, 2020

In a previous blog I showed how the history of a dataset can be queried using the dolt history tables, and in the first part of this 2 part blog I covered the IRS SOI data . In this second part I use the IRS SOI data along with doltpy ...