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Find the minimal unique key for a data.table

Source: R/load-survey-utils.R
find_unique_key.Rd

Given a data.table and a base identifier column, finds the minimal set of additional columns needed to uniquely identify each row.

Usage

find_unique_key(data, base_id = "part_id")

Arguments

data

A data.table

base_id

The base identifier column name (default: "part_id")

Value

A character vector of column names that form the unique key