HTHou commented on a change in pull request #2171:
URL: https://github.com/apache/iotdb/pull/2171#discussion_r537260643
##########
File path: docs/UserGuide/Operation Manual/DML Data Manipulation Language.md
##########
@@ -194,9 +273,15 @@ select count(status) from root.ln.*.* group by level=2
```
Result：
-| count(root.ln.wf01.*.status) | count(root.ln.wf02.*.status) |
-| ---------------------------- | ---------------------------- |
-| 7 | 4
+```
++----------------------------+----------------------------+
+|COUNT(root.ln.wf01.*.status)|COUNT(root.ln.wf02.*.status)|
++----------------------------+----------------------------+
+| 10080| 10082|
++----------------------------+----------------------------+
+Total line number = 1
+It costs 0.003s
+```
All supported aggregation functions are: count, sum, avg, last_value,
first_value, min_time, max_time, min_value, max_value.
Review comment:
How about add more example results like sum or last_value?
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