diff --git a/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/ALTER-SEQUENCE.md b/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/ALTER-SEQUENCE.md
deleted file mode 100644
index 2878494a50e65fabab701196fc076d8f941e3cbd..0000000000000000000000000000000000000000
--- a/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/ALTER-SEQUENCE.md
+++ /dev/null
@@ -1,95 +0,0 @@
----
-title: ALTER SEQUENCE
-summary: ALTER SEQUENCE
-author: Zhang Cuiping
-date: 2021-05-17
----
-
-# ALTER SEQUENCE
-
-## Function
-
-**ALTER SEQUENCE** modifies the parameters of an existing sequence.
-
-## Precautions
-
-- Only the sequence owner or a user granted with the ALTER permission can run the **ALTER SEQUENCE** command. The system administrator has this permission by default. To modify a sequence owner, you must be the sequence owner or system administrator and a member of the new owner role.
-- In the current version, you can modify only the owner, owning column, maximum value and increment. To modify other parameters, delete the sequence and create it again. Then, use the **Setval** function to restore parameter values.
-- **ALTER SEQUENCE MAXVALUE** cannot be used in transactions, functions, and stored procedures.
-- After the maximum value of a sequence is changed, the cache of the sequence in all sessions is cleared.
-- If the LARGE identifier is used when a sequence is created, the LARGE identifier must be used when the sequence is altered.
-- The **ALTER SEQUENCE** statement blocks the invocation of **nextval**, **setval**, **currval**, and **lastval**.
-
-## Syntax
-
-- Change the owning column of a sequence.
-
- ```ebnf+diagram
- AlterSequence ::= ALTER SEQUENCE [ IF EXISTS ] name
- [MAXVALUE maxvalue | NO MAXVALUE | NOMAXVALUE | CACHE cache]
- [ OWNED BY { table_name'.'column_name | NONE } ]
- ```
-
-- Change the owner of a sequence.
-
- ```ebnf+diagram
- AlterSequence ::= ALTER SEQUENCE [ IF EXISTS ] name OWNER TO new_owner;
- ```
-
-- Change the increment of sequence.
-
- ```ebnf+diagram
- AlterSequence ::= ALTER SEQUENCE [ IF EXISTS ] name [ INCREMENT [ BY ] increment ];
- ```
-
-## Parameter Description
-
-- name
-
- Specifies the name of the sequence to be modified.
-
-- IF EXISTS
-
- Sends a notice instead of an error when you are modifying a nonexistent sequence.
-
-- CACHE
-
- Specifies the number of sequences stored in the memory for quick access purposes. If this parameter is not specified, the old cache value is retained.
-
-- OWNED BY
-
- Associates a sequence with a specified column included in a table. In this way, the sequence will be deleted when you delete its associated column or the table where the column belongs to.
-
- If the sequence has been associated with another table before you use this option, the new association will overwrite the old one.
-
- The associated table and sequence must be owned by the same user and in the same schema.
-
- If **OWNED BY NONE** is used, all existing associations will be deleted.
-
-- new_owner
-
- Specifies the username of the new owner of the sequence. To change the owner, you must also be a direct or indirect member of the new role, and this role must have **CREATE** permission on the sequence's schema.
-
-## Examples
-
-```sql
--- Create an ascending sequence named serial, which starts from 101.
-MogDB=# CREATE SEQUENCE serial START 101;
-
--- Create a table and specify default values for the sequence.
-MogDB=# CREATE TABLE T1(C1 bigint default nextval('serial'));
-
--- Change the owning column of serial to T1.C1.
-MogDB=# ALTER SEQUENCE serial OWNED BY T1.C1;
-
--- Change the increment of sequence.
-MogDB=# ALTER SEQUENCE serial increment by 5;
-
--- Delete a sequence and a table.
-MogDB=# DROP SEQUENCE serial cascade;
-MogDB=# DROP TABLE T1;
-```
-
-## Helpful Links
-
-[CREATE SEQUENCE](CREATE-SEQUENCE.md)，[DROP SEQUENCE](DROP-SEQUENCE.md)
diff --git a/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md b/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md
index 4ddcbe802cecf9965720c684994260c684526473..0f7e91ddd76ab5ef0ddc9c6cceca7ded22fe7d76 100644
--- a/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md
+++ b/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md
@@ -145,4 +145,4 @@ MogDB=# DROP SEQUENCE serial1 cascade;
## Helpful Links
-[DROP SEQUENCE](DROP-SEQUENCE.md)，[ALTER SEQUENCE](ALTER-SEQUENCE.md)
+[DROP SEQUENCE](DROP-SEQUENCE.md)
diff --git a/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md b/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md
index 2998e9ef161f59dc8a9466a6c8277b18e0926d79..33bbfa2330ed5174e45f8b89f7685d510c02da81 100644
--- a/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md
+++ b/product/en/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md
@@ -52,4 +52,4 @@ MogDB=# DROP SEQUENCE serial;
## Helpful Links
-[ALTER SEQUENCE](ALTER-SEQUENCE.md) and [CREATE SEQUENCE](CREATE-SEQUENCE.md)
+[CREATE SEQUENCE](CREATE-SEQUENCE.md)
diff --git a/product/en/docs-mogdb/v3.0/toc.md b/product/en/docs-mogdb/v3.0/toc.md
index f4730411ea4d6d7266724a2b00c1b0d93bc376bb..4a8e999a8ce5bddf4e6fcd36ec41275fd5bbde33 100644
--- a/product/en/docs-mogdb/v3.0/toc.md
+++ b/product/en/docs-mogdb/v3.0/toc.md
@@ -865,7 +865,6 @@
+ [ALTER ROW LEVEL SECURITY POLICY](/reference-guide/sql-syntax/ALTER-ROW-LEVEL-SECURITY-POLICY.md)
+ [ALTER RULE](/reference-guide/sql-syntax/ALTER-RULE.md)
+ [ALTER SCHEMA](/reference-guide/sql-syntax/ALTER-SCHEMA.md)
- + [ALTER SEQUENCE](/reference-guide/sql-syntax/ALTER-SEQUENCE.md)
+ [ALTER SERVER](/reference-guide/sql-syntax/ALTER-SERVER.md)
+ [ALTER SESSION](/reference-guide/sql-syntax/ALTER-SESSION.md)
+ [ALTER SUBSCRIPTION](/reference-guide/sql-syntax/ALTER-SUBSCRIPTION.md)
diff --git a/product/en/docs-mogdb/v3.0/toc_datatypes-and-sql.md b/product/en/docs-mogdb/v3.0/toc_datatypes-and-sql.md
index 9d76b15667d9f6a5a03792b1c1f59c65a62810c1..8a2f1f85c81d771e283d6d59a760ea304bcb5e32 100644
--- a/product/en/docs-mogdb/v3.0/toc_datatypes-and-sql.md
+++ b/product/en/docs-mogdb/v3.0/toc_datatypes-and-sql.md
@@ -54,7 +54,6 @@
+ [ALTER ROW LEVEL SECURITY POLICY](/reference-guide/sql-syntax/ALTER-ROW-LEVEL-SECURITY-POLICY.md)
+ [ALTER RULE](/reference-guide/sql-syntax/ALTER-RULE.md)
+ [ALTER SCHEMA](/reference-guide/sql-syntax/ALTER-SCHEMA.md)
- + [ALTER SEQUENCE](/reference-guide/sql-syntax/ALTER-SEQUENCE.md)
+ [ALTER SERVER](/reference-guide/sql-syntax/ALTER-SERVER.md)
+ [ALTER SESSION](/reference-guide/sql-syntax/ALTER-SESSION.md)
+ [ALTER SUBSCRIPTION](/reference-guide/sql-syntax/ALTER-SUBSCRIPTION.md)
diff --git a/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/ALTER-SEQUENCE.md b/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/ALTER-SEQUENCE.md
deleted file mode 100644
index 72139c47eed3c0ab81cad3f1905c8d98056893a0..0000000000000000000000000000000000000000
--- a/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/ALTER-SEQUENCE.md
+++ /dev/null
@@ -1,96 +0,0 @@
----
-title: ALTER SEQUENCE
-summary: ALTER SEQUENCE
-author: Zhang Cuiping
-date: 2021-05-17
----
-
-# ALTER SEQUENCE
-
-## 功能描述
-
-修改一个现有的序列的参数。
-
-## 注意事项
-
-- 只有序列的所有者或者被授予了序列ALTER权限的用户才能执行ALTER SEQUENCE命令，系统管理员默认拥有该权限。但要修改序列的所有者，当前用户必须是该序列的所有者或者系统管理员，且该用户是新所有者角色的成员。
-- 当前版本仅支持修改拥有者、归属列和最大值和increment。若要修改其他参数，可以删除重建，并用Setval函数恢复当前值。
-- ALTER SEQUENCE MAXVALUE不支持在事务、函数和存储过程中使用。
-- 修改序列的最大值后，会清空该序列在所有会话的cache。
-- 如果Sequence被创建时使用了LARGE标识，则ALTER时也需要使用LARGE标识。
-- ALTER SEQUENCE会阻塞nextval、setval、currval和lastval的调用。
-
-## 语法格式
-
-- 修改序列归属列
-
- ```ebnf+diagram
- AlterSequence ::= ALTER SEQUENCE [ IF EXISTS ] name
- [MAXVALUE maxvalue | NO MAXVALUE | NOMAXVALUE | CACHE cache]
- [ OWNED BY { table_name'.'column_name | NONE } ]
- ```
-
-- 修改序列的拥有者
-
- ```ebnf+diagram
- AlterSequence ::= ALTER SEQUENCE [ IF EXISTS ] name OWNER TO new_owner;
- ```
-
-- 修改increment
-
- ```ebnf+diagram
- AlterSequence ::= ALTER SEQUENCE [ IF EXISTS ] name [ INCREMENT [ BY ] increment ];
- ```
-
-## 参数说明
-
-- name
-
- 将要修改的序列名称。
-
-- IF EXISTS
-
- 当序列不存在时使用该选项不会出现错误消息，仅有一个通知。
-
-- CACHE
-
- 为了快速访问，而在内存中预先存储序列号的个数。如果没有指定，将保持旧的缓冲值。
-
-- OWNED BY
-
- 将序列和一个表的指定字段进行关联。这样，在删除那个字段或其所在表的时候会自动删除已关联的序列。
-
- 如果序列已经和表有关联后，使用这个选项后新的关联关系会覆盖旧的关联。
-
- 关联的表和序列的所有者必须是同一个用户，并且在同一个模式中。
-
- 使用OWNED BY NONE将删除任何已经存在的关联。
-
-- new_owner
-
- 序列新所有者的用户名。用户要修改序列的所有者，必须是新角色的直接或者间接成员，并且那个角色必须有序列所在模式上的CREATE权限。
-
-## 示例
-
-```sql
--- 创建一个名为serial的递增序列，从101开始。
-MogDB=# CREATE SEQUENCE serial START 101;
-
--- 创建一个表,定义默认值。
-MogDB=# CREATE TABLE T1(C1 bigint default nextval('serial'));
-
--- 将序列serial的归属列变为T1.C1。
-MogDB=# ALTER SEQUENCE serial OWNED BY T1.C1;
-
--- 修改increment
-MogDB=# ALTER SEQUENCE serial increment by 5;
-
-
--- 删除序列和表。
-MogDB=# DROP SEQUENCE serial cascade;
-MogDB=# DROP TABLE T1;
-```
-
-## 相关链接
-
-[CREATE SEQUENCE](CREATE-SEQUENCE.md)，[DROP SEQUENCE](DROP-SEQUENCE.md)
diff --git a/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md b/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md
index 1e0fc3c021a24d92630bdcba70f68134b3033945..4a710413d1b6acfc382577b213385ed3feb53207 100644
--- a/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md
+++ b/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/CREATE-SEQUENCE.md
@@ -144,4 +144,4 @@ MogDB=# DROP SEQUENCE serial1 cascade;
## 相关链接
-[DROP SEQUENCE](DROP-SEQUENCE.md)，[ALTER SEQUENCE](ALTER-SEQUENCE.md)
+[DROP SEQUENCE](DROP-SEQUENCE.md)
diff --git a/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md b/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md
index fd0d56ede2a10f912b0044ee073a9f494ace7b6a..ca5f8d17c86c19ba71cd27bac85e1411d8ed2c20 100644
--- a/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md
+++ b/product/zh/docs-mogdb/v3.0/reference-guide/sql-syntax/DROP-SEQUENCE.md
@@ -52,4 +52,4 @@ MogDB=# DROP SEQUENCE serial;
## 相关链接
-[ALTER SEQUENCE](ALTER-SEQUENCE.md)， [CREATE SEQUENCE](CREATE-SEQUENCE.md)
+[CREATE SEQUENCE](CREATE-SEQUENCE.md)
diff --git a/product/zh/docs-mogdb/v3.0/toc.md b/product/zh/docs-mogdb/v3.0/toc.md
index 1c59ac48740bbe916dea87a4a443b6629ae5f564..4f15d12eb5c3546a1a7558252b9032b6b6ebd1a4 100644
--- a/product/zh/docs-mogdb/v3.0/toc.md
+++ b/product/zh/docs-mogdb/v3.0/toc.md
@@ -865,7 +865,6 @@
+ [ALTER ROW LEVEL SECURITY POLICY](/reference-guide/sql-syntax/ALTER-ROW-LEVEL-SECURITY-POLICY.md)
+ [ALTER RULE](/reference-guide/sql-syntax/ALTER-RULE.md)
+ [ALTER SCHEMA](/reference-guide/sql-syntax/ALTER-SCHEMA.md)
- + [ALTER SEQUENCE](/reference-guide/sql-syntax/ALTER-SEQUENCE.md)
+ [ALTER SERVER](/reference-guide/sql-syntax/ALTER-SERVER.md)
+ [ALTER SESSION](/reference-guide/sql-syntax/ALTER-SESSION.md)
+ [ALTER SUBSCRIPTION](/reference-guide/sql-syntax/ALTER-SUBSCRIPTION.md)
diff --git a/product/zh/docs-mogdb/v3.0/toc_datatypes-and-sql.md b/product/zh/docs-mogdb/v3.0/toc_datatypes-and-sql.md
index 0d25e2bfc8e432c9e5605f64c504cfdb7c22bf57..e5ead70789f514617e2fe9fcab7410cfa64a99d5 100644
--- a/product/zh/docs-mogdb/v3.0/toc_datatypes-and-sql.md
+++ b/product/zh/docs-mogdb/v3.0/toc_datatypes-and-sql.md
@@ -54,7 +54,6 @@
+ [ALTER ROW LEVEL SECURITY POLICY](/reference-guide/sql-syntax/ALTER-ROW-LEVEL-SECURITY-POLICY.md)
+ [ALTER RULE](/reference-guide/sql-syntax/ALTER-RULE.md)
+ [ALTER SCHEMA](/reference-guide/sql-syntax/ALTER-SCHEMA.md)
- + [ALTER SEQUENCE](/reference-guide/sql-syntax/ALTER-SEQUENCE.md)
+ [ALTER SERVER](/reference-guide/sql-syntax/ALTER-SERVER.md)
+ [ALTER SESSION](/reference-guide/sql-syntax/ALTER-SESSION.md)
+ [ALTER SUBSCRIPTION](/reference-guide/sql-syntax/ALTER-SUBSCRIPTION.md)