Merge branch 'refactor-atomic-commmit-upsert-stage-file-info' of github-datengsky:dantengsky/fuse-query into refactor-atomic-commmit-upsert-stage-file-info

Author: dantengsky

Cargo.lock

@@ -2,7 +2,6 @@
 title: Welcome
 slug: /
 ---
-import GetLatest from '@site/src/components/GetLatest';
 
 Welcome to the Databend documentation! Databend is an **open-source**, **elastic**, and **workload-aware** modern cloud data warehouse designed to meet businesses' massive-scale analytics needs at low cost and with low complexity.
 

docs/doc/00-overview/index.md

@@ -4,7 +4,6 @@ sidebar_label: Python
 description:
    Develop with Databend using Python.
 ---
-import GetLatest from '@site/src/components/GetLatest';
 
 Databend offers the following options enabling you to develop applications using the Python programming language and establish connectivity with Databend:
 

docs/doc/03-develop/01-python.md

@@ -80,7 +80,7 @@ AS SELECT query
 
 Creates a transient table. 
 
-Transient tables are used to hold transitory data that does not require a data protection or recovery mechanism. Dataebend does not hold historical data for a transient table so you will not be able to query from a previous version of the transient table with the Time Travel feature, for example, the [AT](./../../20-query-syntax/03-dml-at.md) clause in the SELECT statement will not work for transient tables. Please note that you can still [drop](./20-ddl-drop-table.md) and [undrop](./21-ddl-undrop-table.md) a transient table.
+Transient tables are used to hold transitory data that does not require a data protection or recovery mechanism. Dataebend does not hold historical data for a transient table so you will not be able to query from a previous version of the transient table with the Time Travel feature, for example, the [AT](./../../20-query-syntax/03-query-at.md) clause in the SELECT statement will not work for transient tables. Please note that you can still [drop](./20-ddl-drop-table.md) and [undrop](./21-ddl-undrop-table.md) a transient table.
 
 Transient tables help save your storage expenses because they do not need extra space for historical data compared to non-transient tables. See [example](#create-transient-table-1) for detailed explanations.
 

docs/doc/14-sql-commands/00-ddl/20-table/10-ddl-create-table.md

@@ -14,7 +14,7 @@ Snapshot, segment, and block are the concepts Databend uses for data storage. Da
 
 Databend automatically creates table snapshots upon data updates. A snapshot represents a version of the table's segment metadata.
 
-When working with Databend, you're most likely to access a snapshot with the snapshot ID when you retrieve and query a previous version of the table's data with the [AT](../../20-query-syntax/03-dml-at.md) clause.
+When working with Databend, you're most likely to access a snapshot with the snapshot ID when you retrieve and query a previous version of the table's data with the [AT](../../20-query-syntax/03-query-at.md) clause.
 
 A snapshot is a JSON file that does not save the table's data but indicate the segments the snapshot links to. If you run [FUSE_SNAPSHOT](../../../15-sql-functions/111-system-functions/fuse_snapshot.md) against a table, you can find the saved snapshots for the table.
 

docs/doc/14-sql-commands/00-ddl/20-table/60-optimize-table.md

@@ -14,7 +14,7 @@ The capability to restore a table is subject to these conditions:
 
 - You cannot roll back after restoring a table to a prior state, but you can restore the table again to an earlier state.
 
-- Databend recommends this command for emergency recovery only. To query the history data of a table, use the [AT](../../20-query-syntax/03-dml-at.md) clause.
+- Databend recommends this command for emergency recovery only. To query the history data of a table, use the [AT](../../20-query-syntax/03-query-at.md) clause.
 
 ## Syntax
 

docs/doc/14-sql-commands/00-ddl/20-table/70-ddl-restore-table.md

@@ -98,7 +98,7 @@ SELECT number FROM numbers(3) AS a;
 
 ## AT Clause
 
-The AT clause enables you to query previous versions of your data. For more information, see [AT](./03-dml-at.md).
+The AT clause enables you to query previous versions of your data. For more information, see [AT](./03-query-at.md).
 
 ## WHERE Clause
 
@@ -142,6 +142,9 @@ SELECT number%2 as c1, number%3 as c2, MAX(number) FROM numbers(10000) GROUP BY
 
 ```
 
+
+`GROUP BY` can be extended with [GROUPING SETS](./07-query-group-by-grouping-sets.md) to do more complex grouping operations.
+
 ## HAVING Clause
 
 ```sql