带有值列表的子集sql列

Question

我有SQL查询：

select timestamp, COUNT(distinct event)"nb events"
from mytable
group by timestamp

并且我有一个来自R值的列表：

event_list <- c(1,2,3,4)

我如何子集我的sql查询事件，所以只有event_list中的事件？我试过了，但是没用：

select Cast([timestamp] as date) "date", COUNT(distinct event)"nb events" %in% event_list
from yourtable
group by Cast([timestamp] as date) 

我真的需要帮助

Answer 1

您正在搜索条件聚合：

select Cast([timestamp] as date) "date",
     COUNT(distinct CASE WHEN event IN (...) THEN event END)"nb events"
from yourtable
group by Cast([timestamp] as date)