Icon for Socrata external plugin

Query the Data Delivery Network

Query the DDN

The easiest way to query any data on Splitgraph is via the "Data Delivery Network" (DDN). The DDN is a single endpoint that speaks the PostgreSQL wire protocol. Any Splitgraph user can connect to it at and query any version of over 40,000 datasets that are hosted or proxied by Splitgraph.

For example, you can query the baseline_study_of_food_for_peace_title_ii table in this repository, by referencing it like:


or in a full query, like:

    ":id", -- Socrata column ID
    "pvo", -- PVO
    "b14", -- B14 Does natural mother usually live in this household
    "reg", -- REGION
    "b20a", -- B20A Highest level completed during the 2012 school year
    "b14b", -- B14 Line number of mother
    "vn", -- Village Number
    "member_id", -- Household member ID for merging with other modules
    "strata", -- Strata
    "b16", -- B16 Does natural father usually live in this household
    "cluster", -- Cluster
    "b18a", -- B18 Highest level of school completed
    "b07", -- B07 IS THIS A CHILD UNDER 6 YEARS
    "b04", -- B04 Sex
    "b11", -- B11 IS THIS PERSON A FARMER
    "hhwt", -- Sampling weight for households and household members
    "b03", -- B03 Relationship to head of household
    "b17", -- B17 Ever attended school
    "b09", -- B09 IS THIS A WOMAN 15 49 YEARS
    "b06", -- B06 Is this person responsible for food preparation
    "b05", -- B05 Age
    "b13", -- B13 Is natural mother alive
    "b15", -- B15 Is natural father alive
    "b16b", -- B14 Line number of Father
    "b18b", -- B18 Highest grade completed at that level
    "b12", -- B12 What is current marital status
    "b19", -- B19 Attend school at any time during the 2012 school year
    "b20b", -- B20B Highest grade completed during the 2012 school year
    "b05_bin", -- Age Binned
    "education_level" -- Education level
LIMIT 100;

Connecting to the DDN is easy. All you need is an existing SQL client that can connect to Postgres. As long as you have a SQL client ready, you'll be able to query usaid-gov/baseline-study-of-food-for-peace-title-ii-2yce-yrp5 with SQL in under 60 seconds.

This repository is an "external" repository. That means it's hosted elsewhere, in this case at When you queryusaid-gov/baseline-study-of-food-for-peace-title-ii-2yce-yrp5:latest on the DDN, we "mount" the repository using the socrata mount handler. The mount handler proxies your SQL query to the upstream data source, translating it from SQL to the relevant language (in this case SoQL).

We also cache query responses on the DDN, but we run the DDN on multiple nodes so a CACHE_HIT is only guaranteed for subsequent queries that land on the same node.

Query Your Local Engine

Install Splitgraph Locally
bash -c "$(curl -sL"

Read the installation docs.

Splitgraph Cloud is built around Splitgraph Core (GitHub), which includes a local Splitgraph Engine packaged as a Docker image. Splitgraph Cloud is basically a scaled-up version of that local Engine. When you query the Data Delivery Network or the REST API, we mount the relevant datasets in an Engine on our servers and execute your query on it.

It's possible to run this engine locally. You'll need a Mac, Windows or Linux system to install sgr, and a Docker installation to run the engine. You don't need to know how to actually use Docker; sgrcan manage the image, container and volume for you.

There are a few ways to ingest data into the local engine.

For external repositories (like this repository), the Splitgraph Engine can "mount" upstream data sources by using sgr mount. This feature is built around Postgres Foreign Data Wrappers (FDW). You can write custom "mount handlers" for any upstream data source. For an example, we blogged about making a custom mount handler for HackerNews stories.

For hosted datasets, where the author has pushed Splitgraph Images to the repository, you can "clone" and/or "checkout" the data using sgr cloneand sgr checkout.

Mounting Data

This repository is an external repository. It's not hosted by Splitgraph. It is hosted by, and Splitgraph indexes it. This means it is not an actual Splitgraph image, so you cannot use sgr clone to get the data. Instead, you can use the socrata adapter with the sgr mount command. Then, if you want, you can import the data and turn it into a Splitgraph image that others can clone.

First, install Splitgraph if you haven't already.

Mount the table with sgr mount

sgr mount socrata \
  "usaid-gov/baseline-study-of-food-for-peace-title-ii-2yce-yrp5" \
  --handler-options '{
    "domain": "",
    "tables": {
        "baseline_study_of_food_for_peace_title_ii": "2yce-yrp5"

That's it! Now you can query the data in the mounted table like any other Postgres table.

Query the data with your existing tools

Once you've loaded the data into your local Splitgraph engine, you can query it with any of your existing tools. As far as they're concerned, usaid-gov/baseline-study-of-food-for-peace-title-ii-2yce-yrp5 is just another Postgres schema.