[GitHub] [spark] cloud-fan commented on a change in pull request #27866: [SPARK-31110][DOCS][SQL] refine sql doc for SELECT

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cloud-fan commented on a change in pull request #27866: [SPARK-31110][DOCS][SQL] refine sql doc for SELECT
URL: https://github.com/apache/spark/pull/27866#discussion_r390799225
 
 

 ##########
 File path: docs/sql-ref-syntax-qry-select-groupby.md
 ##########
 @@ -9,42 +9,43 @@ license: |
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at
- 
+
      http://www.apache.org/licenses/LICENSE-2.0
- 
+
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 ---
-The <code>GROUP BY</code> clause is used to group the rows based on a set of specified grouping expressions and compute aggregations on 
-the group of rows based on one or more specified aggregate functions. Spark also supports advanced aggregations to do multiple 
+The <code>GROUP BY</code> clause is used to group the rows based on a set of specified grouping expressions and compute aggregations on
+the group of rows based on one or more specified aggregate functions. Spark also supports advanced aggregations to do multiple
 aggregations for the same input record set via `GROUPING SETS`, `CUBE`, `ROLLUP` clauses.
 
 ### Syntax
 {% highlight sql %}
-GROUP BY [ GROUPING SETS grouping_sets ] group_expression [ , group_expression [ , ... ] ]
 
 Review comment:
   This was wrong.

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