JingsongLi commented on a change in pull request #9511:
[FLINK-13356][table][docs] Add documentation for TopN and Deduplication in
blink planner
URL: https://github.com/apache/flink/pull/9511#discussion_r316665974
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File path: docs/dev/table/sql.md
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@@ -813,6 +813,222 @@ LIMIT 3
{% top %}
+### Top-N
+
+TopN is used to calculate the maximum/minimum N records in a stream. It can be
flexibly completed based on OVER window aggregation. The grammar is shown as
below:
Review comment:
`The grammar is shown as below:`? but below is sentence too? where is the
grammar?
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