dataset COLLECTION_NAME update KEY
update will replace a JSON document in a dataset collection for a given KEY. By default the JSON document is read from standard input but you can specific a spefic file with the “-input” option. The JSON document should aready exist in the collection when you use update.
In this example we assume there is a JSON document on local disc named jane-doe.json. It
contains {"name":"Jane Doe"}
and the KEY is “jane.doe”. In the first
one we specify the full JSON document via the command line after the KEY.
In the second example we read the data from jane-doe.json. Finally in the last we
read the JSON document from standard input and save the update to “jane.doe”.
The collection name is “people.ds”.
dataset people.ds update jane.doe '{"name":"Jane Doiel"}'
dataset people.ds update jane.doe jane-doe.json
dataset -i jane-doe.json people.ds update jane.doe
cat jane-doe.json | dataset people.ds update jane.doe