Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Update 1.create-tag.md #816

Merged
merged 1 commit into from
Aug 12, 2021
Merged

Update 1.create-tag.md #816

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion docs-2.0/3.ngql-guide/10.tag-statements/1.create-tag.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ CREATE TAG [IF NOT EXISTS] <tag_name>
|`<data_type>`|属性的数据类型。数据类型的完整说明，请参见[数值类型](../3.data-types/1.numeric.md)、[布尔](../3.data-types/2.boolean.md)等文档。|
|`NULL \| NOT NULL`|指定属性值是否支持为`NULL`。默认值为`NULL`。|
|`DEFAULT`|指定属性的默认值。默认值可以是一个文字值或Nebula Graph支持的表达式。如果插入点时没有指定某个属性的值，则使用默认值。|
|`COMMENT`|对单个属性或整个点的描述。最大为256字节。默认无描述。|
|`COMMENT`|对单个属性或Tag的描述。最大为256字节。默认无描述。|
|`TTL_DURATION`|指定属性存活时间。超时的属性将会过期。属性值和时间戳差值之和如果小于当前时间戳，属性就会过期。默认值为`0`，表示属性永不过期。|
|`TTL_COL`|指定要设置存活时间的属性。属性的数据类型必须是`int`或者`timestamp`。一个Tag只能指定一个字段为`TTL_COL`。更多TTL的信息请参见[TTL](../8.clauses-and-options/ttl-options.md)。|

Expand Down