主查询中的 SQL 计数条件

Question

我想为is_initial_event 列选择那些值：值可以是 0 或 1。我只想要那些只有 1 的人。不是说他们同时有 1 和 0。@ 有多个详细信息行987654322@.

select ac.Full_name, pe.program_start_date, pe.program_end_date, tp.approved_by_Description as 
    Approved, ev.is_initial_event, tp.staff from all_clients_view ac  
inner join program_enrollment_expanded_view pe
    on ac.people_id = pe.people_id
inner join  service_plan_goals_objectives_methods_view tp
    on ac.people_id = tp.people_id
inner join service_plan_event_view ev
    on ac.people_id = ev.people_id
where pe.program_name = 'CFTSS' and tp.Approved_by_description is null 

这里我尝试添加计数，我想计算的是如果 people_id 对于 ev.Is_initial_event = 1 有 > 0 并且在 ev.IS_initial_event = 0 时也有 >，那么我不想要那个 people_id只有当它只有 ev.is_initial_event = 1 而不是两者都有记录时。

Answer 1

您在寻找窗口函数吗？

select *
from (
    select 
        ac.Full_name, 
        pe.program_start_date, 
        pe.program_end_date, 
        tp.approved_by_Description as Approved, 
        ev.is_initial_event, 
        tp.staff,
        min(ev.is_initial_event) over(partition by ac.people_id) min_initial_event
    from all_clients_view ac  
    inner join program_enrollment_expanded_view pe
        on ac.people_id = pe.people_id
    inner join service_plan_goals_objectives_methods_view tp
        on ac.people_id = tp.people_id
    inner join service_plan_event_view ev
        on ac.people_id = ev.people_id
    where 
        pe.program_name = 'CFTSS' 
        and tp.Approved_by_description is null
) t
where min_initial_event = 1

这将返回具有相同people_id 的所有行将initial_event 设置为1 的行（请注意，这假定此列仅包含0s 和1s，如您的问题中所述)。