我有一个名为tab1：
Timestamp Username. sessionid
12-12-2020. Ravi. abc123
12-12-2020. Hari. oipio878
12-12-2020. Ravi. ytut987
11-12-2020. Ram. def123
10-12-2020. Ravi. jhgj54
10-12-2020. Shiv. qwee090
10-12-2020. bob. rtet4535
30-12-2020. sita. jgjye56
我想计算每天不同 s 的数量Username，以便输出为：
day. count
10-12-2020. 3
11-12-2020. 1
12-12-2020. 2
30-12-2020. 1
尝试查询：
tab1
| where timestamp > datetime(01-08-2020)
| range timestamp from datetime(01-08-2020) to now() step 1d
| extend day = dayofmonth(timestamp)
| distinct Username
| count
| project day, count