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 february_2021_mixed_topic_volunteering_in_parks table in this repository, by referencing it like:
"edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge:latest"."february_2021_mixed_topic_volunteering_in_parks"or in a full query, like:
SELECT
":id", -- Socrata column ID
"q6a_volunteers_partners_in_parks_word_of_mouth", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Word of Mouth
"q6a_volunteers_partners_in_parks_city_of_edmonton_program_websi", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: City of Edmonton Program Website
"q6a_volunteers_front_yards_in_bloom_nbsp_current_or_previous_pr", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Current or previous program volunteer
"q6a_volunteers_community_weed_pull_community_groups", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Community groups
"q5_volunteers_large_group_of_50_people", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "How would you prefer to volunteer?" Choosing all the apply: Large group of 50+ people
"q2a_volunteers_other_please_specify", -- For those who answered "Yes" in Q2_Volunteers, they were then asked, "Which of the following parks and open space programs have you volunteered for in the past." Choosing all that apply: Other (Please specify)
"responsedate",
"q8_born_canada_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Were you born in Canada? Possible Answers: Yes/No
"q17_city_employee_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Do you work for the City of Edmonton? Possible Answers: Yes/No/Prefer not to say
"q16_education_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - What is the highest level of education you have completed? Possible Answers: Elementary/grade school graduate/High school graduate/College / technical school graduate/University undergraduate degree/Post-graduate degree/Professional school graduate (e.g. medicine, dentistry, veterinary medicine, optometry)
"q15_household_income_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Which of the following categories best describes your total household income in 2014 before taxes? Possible Answers: Under $20,000/$20,000 to $29,999/$30,000 to $39,999/$40,000 to $49,999/$50,000 to $59,999/$60,000 to $79,999/$80,000 to $99,999/$100,000 to $149,000/$150,000 and over/Prefer not to answer
"q14b_secondary_transportation_study_profiling_questionnaire_201", -- Profiling question, one response selected by respondent. - What is your secondary mode of transportation? Possible Answers: Car/truck/Van as DRIVER/Car/truck/van as PASSENGER/Public Transit/Walk/Bicycle/Only have one mode of transportation/Other (Specify)
"q14a_primary_transportation_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - What is your primary mode of transportation? Possible Answers: Car/truck/Van as DRIVER/Car/truck/van as PASSENGER/Public Transit/Walk/Bicycle/Other (Specify)
"q12_employment_status_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - What is your current employment status? Possible Answers: Employed full-time (30+ hours a week)/Employed part-time (0-30 hours a week)/Homemaker/Post-secondary student/High School Student/Unemployed/Permanently unable to Work/Retired/Other (Specify)
"gender_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Are you? Possible Answers: Male/Female/Other/I prefer not to answer
"q6a_volunteers_root_for_trees_newsletters", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Newsletters
"q6a_volunteers_root_for_trees_current_or_previous_program_volun", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Current or previous program volunteer
"q6a_volunteers_root_for_trees_community_groups", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Community groups
"q6a_volunteers_root_for_trees_city_of_edmonton_program_website", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: City of Edmonton Program Website
"q6a_volunteers_partners_in_parks_postcard_brochure", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Postcard/ Brochure
"q6a_volunteers_front_yards_in_bloom_nbsp_postcard_brochure", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Postcard/ Brochure
"q6a_volunteers_front_yards_in_bloom_nbsp_other", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Other (please specify)
"q6a_volunteers_front_yards_in_bloom_nbsp_city_of_edmonton_progr", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: City of Edmonton Program Website
"q6a_volunteers_community_weed_pull_word_of_mouth", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Word of Mouth
"q6a_volunteers_community_weed_pull_postcard_brochure", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Postcard/ Brochure
"q6a_volunteers_community_weed_pull_other", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Other (please specify)
"q6a_volunteers_community_weed_pull_newsletters", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Newsletters
"q6a_volunteers_community_weed_pull_city_of_edmonton_program_web", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: City of Edmonton Program Website
"q5_volunteers_a_cohort_a_small_group_whose_members_do_not_alway", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "How would you prefer to volunteer?" Choosing all the apply: A cohort (a small group whose members do not always keep 2 metres apart)
"q4_volunteers_on_going", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "What is the volunteer term that is most desirable to you?" Choosing all that apply: On-going
"q1_volunteers_city_of_edmonton_program_website", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": City of Edmonton Program Website
"q7_children_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Do you have children 18 or under living at home? Possible Answers: Yes/No
"q13_volunteer_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - In the last 12 months, did you do any activities without pay on behalf of a group or an organization as a volunteer? Possible Answers: Yes/No
"q11_home_language_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - What is the primary language spoken in your household? Possible Answers: English/Arabic/Cantonese/Spanish/Panjabi (Punjabi)/French/German/Mandarin/Tagalog (Pilipino, Filipino)/Ukrainian/Other (Specify)
"fsa_study_profiling_questionnaire_2014", -- Forward Sortation Area (first 3 characters of postal code)
"age_rollup_detailed_study_profiling_questionnaire_2014", -- Profiling question, Based on birthdate entered by Respondent. System Determined. Question: Age Rollup? - Possible Answers: Under 15/15-17/18-24/25-29/30-34/35-39/40-44/45-49/50-54/55-59/60-64/65-69/70-74/75-79/80 and over
"q6a_volunteers_root_for_trees_social_media_facebook_twitter_ins", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Social Media (Facebook/ Twitter/ Instagram)
"q6a_volunteers_root_for_trees_other", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Other (please specify)
"q6a_volunteers_partners_in_parks_social_media_facebook_twitter_", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Social Media (Facebook/ Twitter/ Instagram)
"q6a_volunteers_partners_in_parks_other", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Other (please specify)
"q6a_volunteers_community_weed_pull_social_media_facebook_twitte", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Social Media (Facebook/ Twitter/ Instagram)
"q6a_volunteers_community_weed_pull_current_or_previous_program_", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Current or previous program volunteer
"q6_volunteers_none_of_the_above", -- All respondents were then given information on city-led park beautification programs such as Partners in Parks, Root for Trees, Front Yards in Bloom and Community Weed Pull. They were then asked, "Please indicate which volunteer programs you have heard about prior to completing this survey." Choosing all that apply: None of the above [exclusive]
"q6_volunteers_community_weed_pull", -- All respondents were then given information on city-led park beautification programs such as Partners in Parks, Root for Trees, Front Yards in Bloom and Community Weed Pull. They were then asked, "Please indicate which volunteer programs you have heard about prior to completing this survey." Choosing all that apply: Community Weed Pull
"q6_volunteers_front_yards_in_bloom", -- All respondents were then given information on city-led park beautification programs such as Partners in Parks, Root for Trees, Front Yards in Bloom and Community Weed Pull. They were then asked, "Please indicate which volunteer programs you have heard about prior to completing this survey." Choosing all that apply: Front Yards In Bloom
"q6_volunteers_root_for_trees", -- All respondents were then given information on city-led park beautification programs such as Partners in Parks, Root for Trees, Front Yards in Bloom and Community Weed Pull. They were then asked, "Please indicate which volunteer programs you have heard about prior to completing this survey." Choosing all that apply: Root for Trees
"q6_volunteers_partners_in_parks", -- All respondents were then given information on city-led park beautification programs such as Partners in Parks, Root for Trees, Front Yards in Bloom and Community Weed Pull. They were then asked, "Please indicate which volunteer programs you have heard about prior to completing this survey." Choosing all that apply: Partners in Parks
"q5_volunteers_small_groups_of_2_to_9_people", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "How would you prefer to volunteer?" Choosing all the apply: Small groups of 2 to 9 people
"q5_volunteers_independently_alone", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "How would you prefer to volunteer?" Choosing all the apply: Independently / alone
"q2a_volunteers_root_for_trees", -- For those who answered "Yes" in Q2_Volunteers, they were then asked, "Which of the following parks and open space programs have you volunteered for in the past." Choosing all that apply: Root for Trees
"q2a_volunteers_partners_in_parks", -- For those who answered "Yes" in Q2_Volunteers, they were then asked, "Which of the following parks and open space programs have you volunteered for in the past." Choosing all that apply: Partners in Parks
"q1_volunteers_i_don_t_typically_search_for_volunteer_opportunit", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": I don’t typically search for volunteer opportunities [exclusive]
"q1_volunteers_other_please_specify", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Other (Please specify)
"q1_volunteers_newsletters", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Newsletters
"q1_volunteers_word_of_mouth", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Word of Mouth
"q1_volunteers_postcard_brochure", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Postcard/ Brochure
"index",
"q9a_edmonton_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - How long have you lived in Edmonton? Possible Answers: Less than 1 year/Between 1 to 2 years/Between 3 to 5 years/Greater than 5 years/I do not live in Edmonton
"q6a_volunteers_partners_in_parks_newsletters", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Newsletters
"q6a_volunteers_partners_in_parks_current_or_previous_program_vo", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Current or previous program volunteer
"q6a_volunteers_partners_in_parks_community_groups", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Community groups
"q6a_volunteers_front_yards_in_bloom_nbsp_word_of_mouth", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Word of Mouth
"q6a_volunteers_front_yards_in_bloom_nbsp_social_media_facebook_", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Social Media (Facebook/ Twitter/ Instagram)
"q2a_volunteers_none_of_the_above", -- For those who answered "Yes" in Q2_Volunteers, they were then asked, "Which of the following parks and open space programs have you volunteered for in the past." Choosing all that apply: None of the above [exclusive]
"q2a_volunteers_community_weeds_pull_s", -- For those who answered "Yes" in Q2_Volunteers, they were then asked, "Which of the following parks and open space programs have you volunteered for in the past." Choosing all that apply: Community Weeds Pull(s)
"q6a_volunteers_front_yards_in_bloom_nbsp_community_groups", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Community groups
"q4_volunteers_seasonal", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "What is the volunteer term that is most desirable to you?" Choosing all that apply: Seasonal
"q2a_volunteers_front_yards_in_bloom", -- For those who answered "Yes" in Q2_Volunteers, they were then asked, "Which of the following parks and open space programs have you volunteered for in the past." Choosing all that apply: Front Yards in Bloom
"q1_volunteers_current_or_previous_program_volunteer", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Current or previous program volunteer
"q3_own_rent_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Do you own or rent your primary residence in the City of Edmonton? Possible Answers: Own/Rent
"q10_own_business_study_profiling_questionnaire_2014", -- Profiling question, one response selected by respondent. - Do you own a business in the City of Edmonton? Possible Answers: Yes/No
"q6a_volunteers_root_for_trees_word_of_mouth", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Word of Mouth
"q6a_volunteers_root_for_trees_postcard_brochure", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Postcard/ Brochure
"q4_volunteers_one_time_events", -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "What is the volunteer term that is most desirable to you?" Choosing all that apply: One-time events
"q3_volunteers", -- All respondents were then asked, "Would you be interested in volunteering with the City of Edmonton to beautify parks and open spaces? For example enhancing shrub beds, planting trees, and pulling weeds, etc." Possible answers were: Yes No Not sure
"q2_volunteers", -- Respondents were then asked, "Have you ever participated in a City of Edmonton Volunteer Program in the past?". Possible answers were: Yes No
"q1_volunteers_social_media_facebook_twitter_instagram", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Social Media (Facebook/ Twitter/ Instagram)
"q1_volunteers_community_groups", -- Respondents were given information about the volunteering in parks and open spaces programs. They were then asked, "In general, how do you learn about volunteer opportunities?": Community groups
"q6a_volunteers_front_yards_in_bloom_nbsp_newsletters", -- For those who answered any of "Partners in Parks", "Root for Trees", "Front Yards in Bloom" or "Community Weed Pull" in Q6_Volunteers, they were then asked, "How did you learn about this program?". Choosing all that apply: Newsletters
"q5_volunteers_medium_groups_of_10_to_49_people" -- For respondents who answered, "Yes" in Q3_Volunteers, they were then asked, "How would you prefer to volunteer?" Choosing all the apply: Medium groups of 10 to 49 people
FROM
"edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge:latest"."february_2021_mixed_topic_volunteering_in_parks"
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 edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge with SQL in under 60 seconds.
Query Your Local Engine
Install Splitgraph Locally
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, 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 (like this repository), where the author has pushed Splitgraph Images to the repository, you can "clone" and/or "checkout" the data using sgr cloneand sgr checkout.
Cloning Data
Because edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge:latest is a Splitgraph Image, you can clone the data from Spltgraph Cloud to your local engine, where you can query it like any other Postgres database, using any of your existing tools.
First, install Splitgraph if you haven't already.
Clone the metadata with sgr clone
This will be quick, and does not download the actual data.
sgr clone edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njgeCheckout the data
Once you've cloned the data, you need to "checkout" the tag that you want. For example, to checkout the latest tag:
sgr checkout edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge:latestThis will download all the objects for the latest tag of edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge and load them into the Splitgraph Engine. Depending on your connection speed and the size of the data, you will need to wait for the checkout to complete. Once it's complete, you will be able to query the data like you would any other Postgres database.
Alternatively, use "layered checkout" to avoid downloading all the data
The data in edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge:latest is 0 bytes. If this is too big to download all at once, or perhaps you only need to query a subset of it, you can use a layered checkout.:
sgr checkout --layered edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge:latestThis will not download all the data, but it will create a schema comprised of foreign tables, that you can query as you would any other data. Splitgraph will lazily download the required objects as you query the data. In some cases, this might be faster or more efficient than a regular checkout.
Read the layered querying documentation to learn about when and why you might want to use layered queries.
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, edmonton-ca/february-2021-mixed-topic-volunteering-in-parks-sigy-njge is just another Postgres schema.