diff --git a/docs/en/12-taos-sql/03-table.md b/docs/en/12-taos-sql/03-table.md
index b84c17bfac..10c44848c9 100644
--- a/docs/en/12-taos-sql/03-table.md
+++ b/docs/en/12-taos-sql/03-table.md
@@ -91,15 +91,12 @@ ALTER TABLE [db_name.]tb_name alter_table_clause
 
 alter_table_clause: {
     alter_table_options
-  | ADD COLUMN col_name column_definition
+  | ADD COLUMN col_name column_type
   | DROP COLUMN col_name
-  | MODIFY COLUMN col_name column_definition
+  | MODIFY COLUMN col_name column_type
   | RENAME COLUMN old_col_name new_col_name
 }
 
-column_definition:
-    type_name [comment 'string_value']
-
 alter_table_options:
     alter_table_option ...
 
diff --git a/docs/zh/12-taos-sql/03-table.md b/docs/zh/12-taos-sql/03-table.md
index f5540aeb63..9258258263 100644
--- a/docs/zh/12-taos-sql/03-table.md
+++ b/docs/zh/12-taos-sql/03-table.md
@@ -23,10 +23,7 @@ create_subtable_clause: {
 }
 
 create_definition:
-    col_name column_definition
-
-column_definition:
-    type_name [comment 'string_value']
+    col_name column_type
 
 table_options:
     table_option ...
@@ -92,15 +89,12 @@ ALTER TABLE [db_name.]tb_name alter_table_clause
 
 alter_table_clause: {
     alter_table_options
-  | ADD COLUMN col_name column_definition
+  | ADD COLUMN col_name column_type
   | DROP COLUMN col_name
-  | MODIFY COLUMN col_name column_definition
+  | MODIFY COLUMN col_name column_type
   | RENAME COLUMN old_col_name new_col_name
 }
 
-column_definition:
-    type_name [comment 'string_value']
-
 alter_table_options:
     alter_table_option ...