Query the Data Delivery Network
Query the DDNThe 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 data.splitgraph.com:5432 and query any version of over 40,000 datasets that are hosted or proxied by Splitgraph.
For example, you can query the places_zcta_data_gis_friendly_format_2024_release table in this repository, by referencing it like:
"cdc-gov/places-zcta-data-gis-friendly-format-2024-release-kee5-23sr:latest"."places_zcta_data_gis_friendly_format_2024_release"or in a full query, like:
SELECT
":id", -- Socrata column ID
"geolocation", -- Latitude, Longitude of city centroid (Format: Point(Longitude Latitude))
"emotionspt_crude95ci", -- Estimated confidence interval for crude prevalence of lack of social and emotional support among adults
"emotionspt_crudeprev", -- Model-based estimate for crude prevalence of lack of social and emotional support among adults, 2022
"lacktrpt_crude95ci", -- Estimated confidence interval for crude prevalence of lack of reliable transportation in the past 12 months among adults
"lacktrpt_crudeprev", -- Model-based estimate for crude prevalence of lack of reliable transportation in the past 12 months among adults, 2022
"shututility_crude95ci", -- Estimated confidence interval for crude prevalence of utility services threat in the past 12 months among adults
"shututility_crudeprev", -- Model-based estimate for crude prevalence of utility services threat in the past 12 months among adults, 2022
"housinsecu_crude95ci", -- Estimated confidence interval for crude prevalence of housing insecurity in the past 12 months among adults
"housinsecu_crudeprev", -- Model-based estimate for crude prevalence of housing insecurity in the past 12 months among adults, 2022
"foodinsecu_crude95ci", -- Estimated confidence interval for crude prevalence of food insecurity in the past 12 months among adults
"foodinsecu_crudeprev", -- Model-based estimate for crude prevalence of food insecurity in the past 12 months among adults, 2022
"foodstamp_crude95ci", -- Estimated confidence interval for crude prevalence of received food stamps in the past 12 months among adults
"foodstamp_crudeprev", -- Model-based estimate for crude prevalence of received food stamps in the past 12 months among adults, 2022
"isolation_crude95ci", -- Estimated confidence interval for crude prevalence of feeling socially isolated among adults
"isolation_crudeprev", -- Model-based estimate for crude prevalence of feeling socially isolated among adults, 2022
"disability_crude95ci", -- Estimated confidence interval for crude prevalence of any disability among adults
"disability_crudeprev", -- Model-based estimate for crude prevalence of any disability among adults, 2022
"indeplive_crude95ci", -- Estimated confidence interval for crude prevalence of independent living disability among adults
"indeplive_crudeprev", -- Model-based estimate for crude prevalence of independent living disability among adults, 2022
"selfcare_crude95ci", -- Estimated confidence interval for crude prevalence of self-care disability among adults
"selfcare_crudeprev", -- Model-based estimate for crude prevalence of self-care disability among adults, 2022
"mobility_crude95ci", -- Estimated confidence interval for crude prevalence of mobility disability among adults
"mobility_crudeprev", -- Model-based estimate for crude prevalence of mobility disability among adults, 2022
"cognition_crude95ci", -- Estimated confidence interval for crude prevalence of cognitive disability among adults
"cognition_crudeprev", -- Model-based estimate for crude prevalence of cognitive disability among adults, 2022
"vision_crude95ci", -- Estimated confidence interval for crude prevalence of vision disability among adults
"vision_crudeprev", -- Model-based estimate for crude prevalence of vision disability among adults, 2022
"hearing_crude95ci", -- Estimated confidence interval for crude prevalence of hearing disability among adults
"hearing_crudeprev", -- Model-based estimate for crude prevalence of hearing disability among adults, 2022
"teethlost_crude95ci", -- Estimated confidence interval for crude prevalence of all teeth lost among adults aged >=65 years
"teethlost_crudeprev", -- Model-based estimate for crude prevalence of all teeth lost among adults aged >=65 years, 2022
"stroke_crude95ci", -- Estimated confidence interval for crude prevalence of stroke among adults
"stroke_crudeprev", -- Model-based estimate for crude prevalence of stroke among adults, 2022
"sleep_crude95ci", -- Estimated confidence interval for crude prevalence of short sleep duration among adults
"sleep_crudeprev", -- Model-based estimate for crude prevalence of short sleep duration among adults, 2022
"phlth_crude95ci", -- Estimated confidence interval for crude prevalence of frequent physical distress among adults
"phlth_crudeprev", -- Model-based estimate for crude prevalence of frequent physical distress among adults, 2022
"obesity_crude95ci", -- Estimated confidence interval for crude prevalence of obesity among adults
"obesity_crudeprev", -- Model-based estimate for crude prevalence of obesity among adults, 2022
"mhlth_crude95ci", -- Estimated confidence interval for crude prevalence of frequent mental distress among adults
"mhlth_crudeprev", -- Model-based estimate for crude prevalence of frequent mental distress among adults, 2022
"mammouse_crude95ci", -- Estimated confidence interval for crude prevalence of mammography use among women aged 50–74 years
"mammouse_crudeprev", -- Model-based estimate for crude prevalence of mammography use among women aged 50–74 years, 2022
"lpa_crude95ci", -- Estimated confidence interval for crude prevalence of no leisure-time physical activity among adults
"lpa_crudeprev", -- Model-based estimate for crude prevalence of no leisure-time physical activity among adults, 2022
"highchol_crude95ci", -- Estimated confidence interval for crude prevalence of high cholesterol among adults who have ever been screened
"highchol_crudeprev", -- Model-based estimate for crude prevalence of high cholesterol among adults who have ever been screened, 2021
"ghlth_crude95ci", -- Estimated confidence interval for crude prevalence of fair or poor health among adults
"ghlth_crudeprev", -- Model-based estimate for crude prevalence of fair or poor health among adults, 2022
"diabetes_crude95ci", -- Estimated confidence interval for crude prevalence of diagnosed diabetes among adults
"diabetes_crudeprev", -- Model-based estimate for crude prevalence of diagnosed diabetes among adults, 2022
"depression_crude95ci", -- Estimated confidence interval for crude prevalence of depression among adults
"depression_crudeprev", -- Model-based estimate for crude prevalence of depression among adults, 2022
"dental_crude95ci", -- Estimated confidence interval for crude prevalence of visited dentist or dental clinic in the past year among adults
"dental_crudeprev", -- Model-based estimate for crude prevalence of visited dentist or dental clinic in the past year among adults, 2022
"csmoking_crude95ci", -- Estimated confidence interval for crude prevalence of current cigarette smoking among adults
"csmoking_crudeprev", -- Model-based estimate for crude prevalence of current cigarette smoking among adults, 2022
"copd_crude95ci", -- Estimated confidence interval for crude prevalence of chronic obstructive pulmonary disease among adults
"copd_crudeprev", -- Model-based estimate for crude prevalence of chronic obstructive pulmonary disease among adults, 2022
"colon_screen_crude95ci", -- Estimated confidence interval for crude prevalence of colorectal cancer screening among adults aged 45–75 years
"colon_screen_crudeprev", -- Model-based estimate for crude prevalence of colorectal cancer screening among adults aged 45–75 years, 2022
"cholscreen_crude95ci", -- Estimated confidence interval for crude prevalence of cholesterol screening within the past 5 years among adults
"cholscreen_crudeprev", -- Model-based estimate for crude prevalence of cholesterol screening within the past 5 years among adults, 2021
"checkup_crude95ci", -- Estimated confidence interval for crude prevalence of routine checkup within the past year among adults
"checkup_crudeprev", -- Model-based estimate for crude prevalence of routine checkup within the past year among adults, 2022
"chd_crudeprev", -- Model-based estimate for crude prevalence of coronary heart disease among adults, 2022
"casthma_crude95ci", -- Estimated confidence interval for crude prevalence of current asthma among adults
"casthma_crudeprev", -- Model-based estimate for crude prevalence of current asthma among adults, 2022
"cancer_crude95ci", -- Estimated confidence interval for crude prevalence of cancer (non-skin) or melanoma among adults
"cancer_crudeprev", -- Model-based estimate for crude prevalence of cancer (non-skin) or melanoma among adults, 2022
"bpmed_crude95ci", -- Estimated confidence interval for crude prevalence of taking medicine to control high blood pressure among adults with high blood pressure
"bpmed_crudeprev", -- Model-based estimate for crude prevalence of taking medicine to control high blood pressure among adults with high blood pressure, 2021
"bphigh_crude95ci", -- Estimated confidence interval for crude prevalence of high blood pressure among adults
"bphigh_crudeprev", -- Model-based estimate for crude prevalence of high blood pressure among adults, 2021
"binge_crude95ci", -- Estimated confidence interval for crude prevalence of binge drinking among adults
"binge_crudeprev", -- Model-based estimate for crude prevalence of binge drinking among adults, 2022
"arthritis_crude95ci", -- Estimated confidence interval for crude prevalence of arthritis among adults
"arthritis_crudeprev", -- Model-based estimate for crude prevalence of arthritis among adults, 2022
"access2_crude95ci", -- Estimated confidence interval for crude prevalence of lack of health insurance among adults aged 18-64 years
"access2_crudeprev", -- Model-based estimate for crude prevalence of lack of health insurance among adults aged 18-64 years, 2022
"totalpop18plus", -- Total population 18 and plus of Census 2020
"totalpopulation", -- Total population of Census 2020
"zcta5", -- 5 digits ZIP Code Tabulation Area (ZCTA) Code
"chd_crude95ci" -- Estimated confidence interval for crude prevalence of coronary heart disease among adults
FROM
"cdc-gov/places-zcta-data-gis-friendly-format-2024-release-kee5-23sr:latest"."places_zcta_data_gis_friendly_format_2024_release"
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 cdc-gov/places-zcta-data-gis-friendly-format-2024-release-kee5-23sr with SQL in under 60 seconds.
This repository is an "external" repository. That means it's hosted elsewhere, in this case at data.cdc.gov. When you querycdc-gov/places-zcta-data-gis-friendly-format-2024-release-kee5-23sr: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
bash -c "$(curl -sL https://github.com/splitgraph/splitgraph/releases/latest/download/install.sh)"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 data.cdc.gov, 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 \
"cdc-gov/places-zcta-data-gis-friendly-format-2024-release-kee5-23sr" \
--handler-options '{
"domain": "data.cdc.gov",
"tables": {
"places_zcta_data_gis_friendly_format_2024_release": "kee5-23sr"
}
}'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, cdc-gov/places-zcta-data-gis-friendly-format-2024-release-kee5-23sr is just another Postgres schema.