Update 3.alter-tag.md

vesoft-inc · Feb 18, 2022 · f7536c7 · f7536c7
1 parent 0bd76de
commit f7536c7
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md b/docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md
@@ -14,9 +14,7 @@
 ALTER TAG <tag_name>
     <alter_definition> [[, alter_definition] ...]
     [ttl_definition [, ttl_definition] ... ]
-    [COMMENT '<comment>']
-    [NOT NULL]
-    [DEFAULT <defalut_value>];
+    [COMMENT '<comment>'];
 
 alter_definition:
 | ADD    (prop_name data_type [NULL | NOT NULL] [DEFAULT <default_value>] [COMMENT '<comment>'])