So zeigen Sie die Ausgabe in % mithilfe dieser Fallbedingung in der Clickhouse-Datenbank an

Question

So verwenden Sie diese Fallbedingung in der Clickhouse-Datenbank, um die Ausgabe in %-Form anzuzeigen.

ROUND(count(distinct case when bt.status = 'approved' then bt.id else null end)/count(distinct p.id) * 100) as "SR- txns"

Answer 1

但它按原样工作？？？

create table test(id int, id2 int, status String) Engine=Memory
as select number,number, ['approved', 'completed'][number%3] from numbers(10);

select ROUND(count(distinct case when status = 'approved' then id else null end)/count(distinct id2) * 100) as "SR- txns"
from test
┌─SR- txns─┐
│       30 │
└──────────┘

Clickhouse 风格的语法：

select ROUND(uniqExactIf(id,status = 'approved')/uniqExact(id2) * 100) as "SR- txns"
from test
┌─SR- txns─┐
│       30 │
└──────────┘