sources

This table contains all the sources for our datasets. The description column contains JSON encoded as text that contains useful additional fields like a longer descriptive text "additionalInfo".

Data license: CC-BY

1 row where datasetId = 2720 sorted by id descending

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id ▲ name description createdAt updatedAt datasetId additionalInfo link dataPublishedBy
15453 Letter postage - United States Postal Service 
{
    "link": "https://about.usps.com/who-we-are/postal-history/domestic-letter-rates-since-1863.pdf",
    "retrievedDate": "04/04/2018",
    "additionalInfo": "Postage rate refers to 1/2 ounces for 1863 and 1883. 1885 onward postage rates refer to 1 ounce letters. Two observations were reported for 1981, the average of the two observations is reported.\n\nThe real postage rates were calculated: \n\nReal postage rate = Nominal postage rate / ( Price Index / 100 )\n\nReal rates for stamped cards and postcards, and domestic letters were calculated using the annual consumer price index for the United States, available at: https://www.measuringworth.com/datasets/uscpi/\nFull reference: Samuel H. Williamson, \"The Annual Consumer Price Index for the United States, 1774-Present,\" MeasuringWorth, 2018. ",
    "dataPublishedBy": "United States Postal Service",
    "dataPublisherSource": "Historical data"
}
 2018-04-04 15:53:52 2018-04-13 13:55:16 Postage rates - United States Postal Service (2018) 2720 Postage rate refers to 1/2 ounces for 1863 and 1883. 1885 onward postage rates refer to 1 ounce letters. Two observations were reported for 1981, the average of the two observations is reported. The real postage rates were calculated: Real postage rate = Nominal postage rate / ( Price Index / 100 ) Real rates for stamped cards and postcards, and domestic letters were calculated using the annual consumer price index for the United States, available at: https://www.measuringworth.com/datasets/uscpi/ Full reference: Samuel H. Williamson, "The Annual Consumer Price Index for the United States, 1774-Present," MeasuringWorth, 2018. https://about.usps.com/who-we-are/postal-history/domestic-letter-rates-since-1863.pdf United States Postal Service

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CREATE TABLE "sources" (
	"id" INTEGER PRIMARY KEY AUTOINCREMENT,
	"name" VARCHAR(512) NULL  ,
	"description" TEXT NOT NULL  ,
	"createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ,
	"updatedAt" DATETIME NULL  ,
	"datasetId" INTEGER NULL, additionalInfo TEXT GENERATED ALWAYS as (JSON_EXTRACT(description, '$.additionalInfo')) VIRTUAL, link TEXT GENERATED ALWAYS as (JSON_EXTRACT(description, '$.link')) VIRTUAL, dataPublishedBy TEXT GENERATED ALWAYS as (JSON_EXTRACT(description, '$.dataPublishedBy')) VIRTUAL,
	FOREIGN KEY("datasetId") REFERENCES "datasets" ("id") ON UPDATE RESTRICT ON DELETE RESTRICT
);
CREATE INDEX "sources_datasetId" ON "sources" ("datasetId");