Upsolver
Search…
LAST_EACH
Returns an array of last values in the time window, grouped by a sub-key. The statement is limited to a maximum number of values.

Syntax

LAST_EACH([MAX VALUES, ]GROUP, VALUE)

Arguments

MAX VALUES: limit of number of key\value elements in the output GROUP: field to aggregate by VALUE: field to sub-aggregate by

‌ Returns

For each key aggregated in the query the function returns an array or key\value pairs of LAST values.

Notes

This function is non-deterministic.

AVAILABLE IN

Output Type Availablity Aggregate No Explicit Lookup Table Yes Inline Joins\Lookups No

Example

Data

1
[
2
{
3
"GROUP_ID":"G1",
4
"USER_ID":"U1",
5
"CONNECTION_TIME":"2020-06-26 02:31:29,573"
6
},
7
{
8
"GROUP_ID":"G1",
9
"USER_ID":"U2",
10
"CONNECTION_TIME":"2020-06-26 18:11:45,783"
11
},
12
{
13
"GROUP_ID":"G2",
14
"USER_ID":"Z1",
15
"CONNECTION_TIME":"2020-06-26 23:54:27,687"
16
},
17
{
18
"GROUP_ID":"G2",
19
"CONNECTION_TIME":"2020-07-26 23:54:27,687"
20
},
21
{
22
"GROUP_ID":"G1",
23
"USER_ID":"U2",
24
"CONNECTION_TIME":"2021-07-01 02:31:29,573"
25
},
26
{
27
"GROUP_ID":"G1",
28
"USER_ID":"U1",
29
"CONNECTION_TIME":"2021-07-01 18:11:45,783"
30
},
31
{
32
"GROUP_ID":"G2",
33
"USER_ID":"Z1",
34
"CONNECTION_TIME":"2021-07-01 23:54:27,687"
35
}
36
]
Copied!

Query

For each group get a list of users and their last connection time in the time window:
1
SET
2
DATE_TIME = TO_DATE(data.CONNECTION_TIME);
3
SELECT
4
data.GROUP_ID AS group_id:STRING,
5
LAST_EACH(data.USER_ID, data.CONNECTION_TIME) AS last_each_data_user_id__data_connection_time
6
FROM
7
"SAMPLE_DATA_G1U1 - json"
8
GROUP BY
9
data.GROUP_ID
Copied!

Results

1
{
2
"last_each_data_user_iddata_connection_time":[
3
{
4
"key":"Z1",
5
"value":"2021-07-01 23:54:27,687"
6
}
7
],
8
"group_id":"G2"
9
}{
10
"last_each_data_user_iddata_connection_time":[
11
{
12
"key":"U1",
13
"value":"2021-07-01 18:11:45,783"
14
},
15
{
16
"key":"U2",
17
"value":"2021-07-01 02:31:29,573"
18
}
19
],
20
"group_id":"G1"
21
}
Copied!

Dialog

Last modified 8mo ago