> For the complete documentation index, see [llms.txt](https://digitalgarden.batamladen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://digitalgarden.batamladen.com/notes/query-languages/kql/summarize-or-bin-or-dcount-or-avg-or-countif.md).
# summarize | bin |dcount |avg | countif
### bin
**`bin()`** groups values into buckets (bins) of a specified size.
When using bin we should specify 2 params, the column that we want to make buckets of and the timeframe.
```
DeviceEvents
| summarize count() by bin(Timestamp,1h)
```
another example:
Guest sign-ins in the past month separated by day
```
SigninLogs
| where Timestamp >= ago(30d)
| where UserType == 'Guest'
| summarize count() by bin(TimeGenerated, 1h)
| sort by TimeGenerated asc
```
***
### avg()
**`avg()`** = calculates the **average (mean)** value of a column.
| Response Time |
| ------------- |
| 100 |
| 200 |
| 300 |
```
| summarize avg(ResponseTime)
```
Result: 200
Example:
```kql
VMConnection
| project TimeGenerated, BytesSent
| summarize count(), min(BytesSent), max(BytesSent) by bin(TimeGenerated, 1h)
| sort by TimeGenerated asc
```
if we now add the avg, it will add another field that will display the average maxbytes sent per count.
```
VMConnection
| project TimeGenerated, BytesSent
| summarize count(), min(BytesSent), max(BytesSent), avg(BytesSent) by bin(TimeGenerated, 1h)
| sort by TimeGenerated asc
```
***
### countif
**`countif()`** = counts only the rows where a condition is true.
| User | Result |
| ------- | ------- |
| Alice | Failed |
| Bob | Failed |
| Charles | Success |
| David | Success |
```
| summarize countif(Result == "Failed")
```
Returns: `2`
Example:
Find the total number of bytes in each hourly bucket, also count records that have value more than 0.
```
VMConnection
| project TimeGenerated, BytesSent
| summarize RecordsPerHour=count(), RecordsGreatherThanZero=countif(BytesSent > 0), min(BytesSent), max(BytesSent), TotalBytesSent=sum(BytesSent), avg(BytesSent) by bin(TimeGenerated, 1h)
| sort by TimeGenerated asc
```
---
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