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correct 1.create-tag.md TTL_DURATION #1873

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Jun 14, 2022
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correct 1.create-tag.md TTL_DURATION #1873

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a89ce27
correct 1.create-tag.md TTL_DURATION
red-vel Jun 13, 2022
f6f3b4b
Update 1.create-tag.md
abby-cyber Jun 14, 2022
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2 changes: 1 addition & 1 deletion docs-2.0/3.ngql-guide/10.tag-statements/1.create-tag.md
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Expand Up @@ -37,7 +37,7 @@ CREATE TAG [IF NOT EXISTS] <tag_name>
|`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 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_DURATION`|指定时间戳差值，单位：秒。时间戳差值必须为 64 位非负整数。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)。|

## 示例
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