with t0 as (select a.campaign_id, campaign_name, sum(case when event_time like '2023-02%' and event_type='signup' then 1 else 0 end) as conv_2023_02, sum(case when event_time like '2024-02%' and event_type='signup' then 1 else 0 end) as conv_2024_02, sum(case when event_time like '2024-01%' and even...