From 4b056b2ef0cbb9231dd09a2c785f8c10059a2c01 Mon Sep 17 00:00:00 2001
From: Feng Liyuan <darktemplar.f@gmail.com>
Date: Thu, 18 Jun 2020 16:47:06 +0800
Subject: [PATCH] cherry pick #2941 to release-4.0

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
---
 TOC.md                                     |  1 +
 sql-statements/sql-statement-drop-stats.md | 70 ++++++++++++++++++++++
 statistics.md                              |  4 ++
 3 files changed, 75 insertions(+)
 create mode 100644 sql-statements/sql-statement-drop-stats.md

diff --git a/TOC.md b/TOC.md
index e55f3908149cb..94a16172d8988 100644
--- a/TOC.md
+++ b/TOC.md
@@ -231,6 +231,7 @@
       + [`DROP DATABASE`](/sql-statements/sql-statement-drop-database.md)
       + [`DROP INDEX`](/sql-statements/sql-statement-drop-index.md)
       + [`DROP SEQUENCE`](/sql-statements/sql-statement-drop-sequence.md)
+      - [`DROP STATS`](/sql-statements/sql-statement-drop-stats.md)
       + [`DROP TABLE`](/sql-statements/sql-statement-drop-table.md)
       + [`DROP USER`](/sql-statements/sql-statement-drop-user.md)
       + [`DROP VIEW`](/sql-statements/sql-statement-drop-view.md)
diff --git a/sql-statements/sql-statement-drop-stats.md b/sql-statements/sql-statement-drop-stats.md
new file mode 100644
index 0000000000000..5fe1ee64fe25a
--- /dev/null
+++ b/sql-statements/sql-statement-drop-stats.md
@@ -0,0 +1,70 @@
+---
+title: DROP STATS
+summary: An overview of the usage of DROP STATS for the TiDB database.
+category: reference
+---
+
+# DROP STATS
+
+The `DROP STATS` statement is used to delete the statistics of the selected table from the selected database.
+
+## Synopsis
+
+**DropStatsStmt:**
+
+![DropTableStmt](/media/sqlgram/DropStatsStmt.png)
+
+**TableName:**
+
+![TableName](/media/sqlgram/TableName.png)
+
+## Examples
+
+{{< copyable "sql" >}}
+
+```sql
+CREATE TABLE t(a INT);
+```
+
+```sql
+Query OK, 0 rows affected (0.01 sec)
+```
+
+{{< copyable "sql" >}}
+
+```sql
+SHOW STATS_META WHERE db_name='test' and table_name='t';
+```
+
+```sql
++---------+------------+----------------+---------------------+--------------+-----------+
+| Db_name | Table_name | Partition_name | Update_time         | Modify_count | Row_count |
++---------+------------+----------------+---------------------+--------------+-----------+
+| test    | t          |                | 2020-05-25 20:34:33 |            0 |         0 |
++---------+------------+----------------+---------------------+--------------+-----------+
+1 row in set (0.00 sec)
+```
+
+{{< copyable "sql" >}}
+
+```sql
+DROP STATS t;
+```
+
+```sql
+Query OK, 0 rows affected (0.00 sec)
+```
+
+{{< copyable "sql" >}}
+
+```sql
+SHOW STATS_META WHERE db_name='test' and table_name='t';
+```
+
+```sql
+Empty set (0.00 sec)
+```
+
+## See also
+
+* [Introduction to Statistics](/statistics.md)
diff --git a/statistics.md b/statistics.md
index 4ced566a9af74..8a887e8275d41 100644
--- a/statistics.md
+++ b/statistics.md
@@ -313,3 +313,7 @@ LOAD STATS 'file_name'
 ```
 
 `file_name` is the file name of the statistics to be imported.
+
+## See also
+
+* [DROP STATS](/sql-statements/sql-statement-drop-stats.md)