primary_keys {cohortBuilder} | R Documentation |
Primary keys can be defined as 'primary_keys' parameter of set_source method. Currently, primary keys are used only to show keys information in attrition plot (See attrition).
primary_keys(...)
... |
Data keys describing tables primary keys. |
List of class 'primary_keys' storing data_keys objects.
primary_keys(
data_key('books', 'book_id'),
data_key('borrowed', c('user_id', 'books_id', 'date'))
)