Union all cohorts in a cohort set with cohorts in a second cohort set
cohortUnion(x, y)cohort_union(x, y)
A lazy query that when executed will resolve to a new cohort table with one the same cohort_definitions_ids in x resulting from the union of all cohorts in x with the single cohort in y cohort table
A tbl reference to a cohort table with one or more generated cohorts
A tbl reference to a cohort table with one generated cohort