sections: binary_data:binary-linking

This data as json

id	page	ref	title	content	breadcrumbs	references
binary_data:binary-linking	binary_data	binary-linking	Linking to binary downloads	The .blob output format is used to return binary data. It requires a _blob_column= query string argument specifying which BLOB column should be downloaded, for example: https://latest.datasette.io/fixtures/binary_data/1.blob?_blob_column=data This output format can also be used to return binary data from an arbitrary SQL query. Since such queries do not specify an exact row, an additional ?_blob_hash= parameter can be used to specify the SHA-256 hash of the value that is being linked to. Consider the query select data from binary_data - demonstrated here . That page links to the binary value downloads. Those links look like this: https://latest.datasette.io/fixtures.blob?sql=select+data+from+binary_data&_blob_column=data&_blob_hash=f3088978da8f9aea479ffc7f631370b968d2e855eeb172bea7f6c7a04262bb6d These .blob links are also returned in the .csv exports Datasette provides for binary tables and queries, since the CSV format does not have a mechanism for representing binary data.	["Binary data"]	[{"href": "https://latest.datasette.io/fixtures/binary_data/1.blob?_blob_column=data", "label": "https://latest.datasette.io/fixtures/binary_data/1.blob?_blob_column=data"}, {"href": "https://latest.datasette.io/fixtures?sql=select+data+from+binary_data", "label": "demonstrated here"}, {"href": "https://latest.datasette.io/fixtures.blob?sql=select+data+from+binary_data&_blob_column=data&_blob_hash=f3088978da8f9aea479ffc7f631370b968d2e855eeb172bea7f6c7a04262bb6d", "label": "https://latest.datasette.io/fixtures.blob?sql=select+data+from+binary_data&_blob_column=data&_blob_hash=f3088978da8f9aea479ffc7f631370b968d2e855eeb172bea7f6c7a04262bb6d"}]