-- NOTE: SELECT DISTINCT ON expressions must match initial ORDER BY expressions
SELECT
DISTINCT ON (column1) column_alias,
column2
FROM
table_name
ORDER BY
column1,
column2;
Code language: SQL (Structured Query Language) (sql)
-- EXAMPLE
SELECT
DISTINCT on (client_id) client_id, id
FROM
public.dw_client_plan_histories
where operation = 4
and original_created_at >= '2022-06-17';