3832. Find Users with Persistent Behavior Patterns

Table: activity +--------------+---------+ | Column Name | Type | +--------------+---------+ | user_id | int | | action_date | date | | action | varchar | +--------------+---------+ (user_id, action_date, action) is the primary key (unique value) for this table. Each row represents a user performing a specific action on a given date. Write a solution to identify behaviorally stable users based o