PostgreSQL查询本周数据

我正在尝试获取本周已预订的所有约会我最初尝试了以下方法：

select * 
from   appointments 
where  staff_id = 'id' 
and   (to_timestamp(appointments.start_time)) > (current_date - interval '1 week') 
and   (to_timestamp(appointments.start_time)) < (current_date + interval '1 week') 

这只是选择所有等于+/-7天的约会，因此不是当前一周。这是我的下一次尝试。我知道它坏了，但我想它能说明问题

select * 
from   appointments 
where  staff_id = 'id' 
and    (to_timestamp(appointments.start_time)) > (current_date - interval concat(extract(dow from current_date), ' days')) 
and    (to_timestamp(appointments.start_time)) < (current_date + interval concat(7 - extract(dow from current_date), ' days'))

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我将如何构建此查询

如果你同意Postgres对一周的定义，那么你可以：

select a.*
from appointments a
where staff_id = 'id' and 
      to_timestamp(appointments.start_time) >= date_trunc('week', current_date) and
      to_timestamp(appointments.start_time) < date_trunc('week', current_date) + interval '1 week';