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Merge pull request #20799 from taosdata/docs/3.0_doc_wxy 

fix: delete column comment syntax
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wade zhang 2023-04-07 10:28:01 +08:00 committed by GitHub
parent 54f13f6f55 554e02ba62
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3
docs/en/12-taos-sql/04-stable.md
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@ -13,12 +13,11 @@ create_definition:
col_name column_definition col_name column_definition
column_definition: column_definition:
type_name [COMMENT 'string_value'] type_name
``` ```
**More explanations** **More explanations**
- Each supertable can have a maximum of 4096 columns, including tags. The minimum number of columns is 3: a timestamp column used as the key, one tag column, and one data column. - Each supertable can have a maximum of 4096 columns, including tags. The minimum number of columns is 3: a timestamp column used as the key, one tag column, and one data column.
- When you create a supertable, you can add comments to columns and tags.
- The TAGS keyword defines the tag columns for the supertable. The following restrictions apply to tag columns: - The TAGS keyword defines the tag columns for the supertable. The following restrictions apply to tag columns:
- A tag column can use the TIMESTAMP data type, but the values in the column must be fixed numbers. Timestamps including formulae, such as "now + 10s", cannot be stored in a tag column. - A tag column can use the TIMESTAMP data type, but the values in the column must be fixed numbers. Timestamps including formulae, such as "now + 10s", cannot be stored in a tag column.
- The name of a tag column cannot be the same as the name of any other column. - The name of a tag column cannot be the same as the name of any other column.

3
docs/zh/12-taos-sql/04-stable.md
View File

@ -13,12 +13,11 @@ create_definition:
col_name column_definition col_name column_definition
column_definition: column_definition:
type_name [COMMENT 'string_value'] type_name
``` ```
**使用说明** **使用说明**
- 超级表中列的最大个数为 4096，需要注意，这里的 4096 是包含 TAG 列在内的，最小个数为 3，包含一个时间戳主键、一个 TAG 列和一个数据列。 - 超级表中列的最大个数为 4096，需要注意，这里的 4096 是包含 TAG 列在内的，最小个数为 3，包含一个时间戳主键、一个 TAG 列和一个数据列。
- 建表时可以给列或标签附加注释。
- TAGS语法指定超级表的标签列，标签列需要遵循以下约定： - TAGS语法指定超级表的标签列，标签列需要遵循以下约定：
- TAGS 中的 TIMESTAMP 列写入数据时需要提供给定值，而暂不支持四则运算，例如 NOW + 10s 这类表达式。 - TAGS 中的 TIMESTAMP 列写入数据时需要提供给定值，而暂不支持四则运算，例如 NOW + 10s 这类表达式。
- TAGS 列名不能与其他列名相同。 - TAGS 列名不能与其他列名相同。