TabSeparatedWithNamesAndTypes

TabSeparatedWithNamesAndTypes 格式文档

输入	输出	别名
✔	✔	TSVWithNamesAndTypes, RawWithNamesAndTypes

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描述

与 TabSeparated 格式不同的是，该格式会将列名写入第一行，将列类型写入第二行。

• 如果将设置 input_format_with_names_use_header 设为 1， 则会根据名称将输入数据中的列映射到表中的列上；如果将设置 input_format_skip_unknown_fields 设为 1，则会跳过名称未知的列。 否则，第一行会被跳过。
• 如果将设置 input_format_with_types_use_header 设为 1， 则会将输入数据中的类型与表中对应列的类型进行比较。否则，第二行会被跳过。

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示例用法

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插入数据

使用下面这个名为 football.tsv 的 TSV 文件：

date    season  home_team       away_team       home_team_goals away_team_goals
Date    Int16   LowCardinality(String)  LowCardinality(String)  Int8    Int8
2022-04-30      2021    Sutton United   Bradford City   1       4
2022-04-30      2021    Swindon Town    Barrow  2       1
2022-04-30      2021    Tranmere Rovers Oldham Athletic 2       0
2022-05-02      2021    Port Vale       Newport County  1       2
2022-05-02      2021    Salford City    Mansfield Town  2       2
2022-05-07      2021    Barrow  Northampton Town        1       3
2022-05-07      2021    Bradford City   Carlisle United 2       0
2022-05-07      2021    Bristol Rovers  Scunthorpe United       7       0
2022-05-07      2021    Exeter City     Port Vale       0       1
2022-05-07      2021    Harrogate Town A.F.C.   Sutton United   0       2
2022-05-07      2021    Hartlepool United       Colchester United       0       2
2022-05-07      2021    Leyton Orient   Tranmere Rovers 0       1
2022-05-07      2021    Mansfield Town  Forest Green Rovers     2       2
2022-05-07      2021    Newport County  Rochdale        0       2
2022-05-07      2021    Oldham Athletic Crawley Town    3       3
2022-05-07      2021    Stevenage Borough       Salford City    4       2
2022-05-07      2021    Walsall Swindon Town    0       3

插入数据：

INSERT INTO football FROM INFILE 'football.tsv' FORMAT TabSeparatedWithNamesAndTypes;

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读取数据

使用 TabSeparatedWithNamesAndTypes 格式来读取数据：

SELECT *
FROM football
FORMAT TabSeparatedWithNamesAndTypes

输出将采用制表符分隔格式，并包含两行表头，分别表示列名和类型：

date    season  home_team       away_team       home_team_goals away_team_goals
Date    Int16   LowCardinality(String)  LowCardinality(String)  Int8    Int8
2022-04-30      2021    Sutton United   Bradford City   1       4
2022-04-30      2021    Swindon Town    Barrow  2       1
2022-04-30      2021    Tranmere Rovers Oldham Athletic 2       0
2022-05-02      2021    Port Vale       Newport County  1       2
2022-05-02      2021    Salford City    Mansfield Town  2       2
2022-05-07      2021    Barrow  Northampton Town        1       3
2022-05-07      2021    Bradford City   Carlisle United 2       0
2022-05-07      2021    Bristol Rovers  Scunthorpe United       7       0
2022-05-07      2021    Exeter City     Port Vale       0       1
2022-05-07      2021    Harrogate Town A.F.C.   Sutton United   0       2
2022-05-07      2021    Hartlepool United       Colchester United       0       2
2022-05-07      2021    Leyton Orient   Tranmere Rovers 0       1
2022-05-07      2021    Mansfield Town  Forest Green Rovers     2       2
2022-05-07      2021    Newport County  Rochdale        0       2
2022-05-07      2021    Oldham Athletic Crawley Town    3       3
2022-05-07      2021    Stevenage Borough       Salford City    4       2
2022-05-07      2021    Walsall Swindon Town    0       3

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格式设置