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Update 6.cheatsheet-for-ngql-command.md #1915

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Jun 29, 2022
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Update 6.cheatsheet-for-ngql-command.md #1915

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2 changes: 1 addition & 1 deletion docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md
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| 语句 | 语法 | 示例 | 说明 |
| ------------------------------------------------------------ | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
| [CREATE TAG](../3.ngql-guide/10.tag-statements/1.create-tag.md) | `CREATE TAG [IF NOT EXISTS] <tag_name> ( <prop_name> <data_type> [NULL | NOT NULL] [DEFAULT <default_value>] [COMMENT '<comment>'] [{, <prop_name> <data_type> [NULL | NOT NULL] [DEFAULT <default_value>] [COMMENT '<comment>']} ...] ) [TTL_DURATION = <ttl_duration>] [TTL_COL = <prop_name>] [COMMENT = '<comment>'] ` | `CREATE TAG woman(name string, age int, married bool, salary double, create_time timestamp) TTL_DURATION = 100, TTL_COL = "create_time"` | 通过指定名称创建一个 Tag。 |
| [DROP TAG](../3.ngql-guide/10.tag-statements/2.drop-tag.md) | `DROP TAG [IF EXISTS] <tag_name>` | `CREATE TAG test(p1 string, p2 int)` | 删除当前工作空间内所有点上的指定 Tag。 |
| [DROP TAG](../3.ngql-guide/10.tag-statements/2.drop-tag.md) | `DROP TAG [IF EXISTS] <tag_name>` | `DROP TAG test;` | 删除当前工作空间内所有点上的指定 Tag。 |
| [ALTER TAG](../3.ngql-guide/10.tag-statements/3.alter-tag.md) | `ALTER TAG <tag_name> <alter_definition> [, alter_definition] ...] [ttl_definition [, ttl_definition] ... ] [COMMENT = '<comment>']` | `ALTER TAG t1 ADD (p3 int, p4 string)` | 修改 Tag 的结构。例如增删属性、修改数据类型，也可以为属性设置、修改 [TTL](../3.ngql-guide/8.clauses-and-options/ttl-options.md)（Time-To-Live)。 |
| [SHOW TAGS](../3.ngql-guide/10.tag-statements/4.show-tags.md) | `SHOW TAGS` | `SHOW TAGS` | 显示当前图空间内的所有 Tag 名称。 |
| [DESCRIBE TAG](../3.ngql-guide/10.tag-statements/5.describe-tag.md) | `DESC[RIBE] TAG <tag_name>` | `DESCRIBE TAG player` | 查看指定 Tag 的详细信息，例如字段名称、数据类型等。 |
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