JSONStrings
| Вход | Выход | Псевдоним |
|---|---|---|
| ✔ | ✔ |
Описание
Отличается от формата JSON только тем, что поля данных выводятся в виде строк, а не типизированных значений JSON.
Пример использования
Вставка данных
Используем JSON-файл со следующими данными, сохранённый как football.json:
{
"meta":
[
{
"name": "date",
"type": "Date"
},
{
"name": "season",
"type": "Int16"
},
{
"name": "home_team",
"type": "LowCardinality(String)"
},
{
"name": "away_team",
"type": "LowCardinality(String)"
},
{
"name": "home_team_goals",
"type": "Int8"
},
{
"name": "away_team_goals",
"type": "Int8"
}
],
"data":
[
{
"date": "2022-04-30",
"season": "2021",
"home_team": "Sutton United",
"away_team": "Bradford City",
"home_team_goals": "1",
"away_team_goals": "4"
},
{
"date": "2022-04-30",
"season": "2021",
"home_team": "Swindon Town",
"away_team": "Barrow",
"home_team_goals": "2",
"away_team_goals": "1"
},
{
"date": "2022-04-30",
"season": "2021",
"home_team": "Tranmere Rovers",
"away_team": "Oldham Athletic",
"home_team_goals": "2",
"away_team_goals": "0"
},
{
"date": "2022-05-02",
"season": "2021",
"home_team": "Port Vale",
"away_team": "Newport County",
"home_team_goals": "1",
"away_team_goals": "2"
},
{
"date": "2022-05-02",
"season": "2021",
"home_team": "Salford City",
"away_team": "Mansfield Town",
"home_team_goals": "2",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Barrow",
"away_team": "Northampton Town",
"home_team_goals": "1",
"away_team_goals": "3"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Bradford City",
"away_team": "Carlisle United",
"home_team_goals": "2",
"away_team_goals": "0"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Bristol Rovers",
"away_team": "Scunthorpe United",
"home_team_goals": "7",
"away_team_goals": "0"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Exeter City",
"away_team": "Port Vale",
"home_team_goals": "0",
"away_team_goals": "1"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Harrogate Town A.F.C.",
"away_team": "Sutton United",
"home_team_goals": "0",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Hartlepool United",
"away_team": "Colchester United",
"home_team_goals": "0",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Leyton Orient",
"away_team": "Tranmere Rovers",
"home_team_goals": "0",
"away_team_goals": "1"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Mansfield Town",
"away_team": "Forest Green Rovers",
"home_team_goals": "2",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Newport County",
"away_team": "Rochdale",
"home_team_goals": "0",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Oldham Athletic",
"away_team": "Crawley Town",
"home_team_goals": "3",
"away_team_goals": "3"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Stevenage Borough",
"away_team": "Salford City",
"home_team_goals": "4",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Walsall",
"away_team": "Swindon Town",
"home_team_goals": "0",
"away_team_goals": "3"
}
]
}
Добавьте данные:
INSERT INTO football FROM INFILE 'football.json' FORMAT JSONStrings;
Чтение данных
Считайте данные в формате JSONStrings:
SELECT *
FROM football
FORMAT JSONStrings
Результат будет в формате JSON:
{
"meta":
[
{
"name": "date",
"type": "Date"
},
{
"name": "season",
"type": "Int16"
},
{
"name": "home_team",
"type": "LowCardinality(String)"
},
{
"name": "away_team",
"type": "LowCardinality(String)"
},
{
"name": "home_team_goals",
"type": "Int8"
},
{
"name": "away_team_goals",
"type": "Int8"
}
],
"data":
[
{
"date": "2022-04-30",
"season": "2021",
"home_team": "Sutton United",
"away_team": "Bradford City",
"home_team_goals": "1",
"away_team_goals": "4"
},
{
"date": "2022-04-30",
"season": "2021",
"home_team": "Swindon Town",
"away_team": "Barrow",
"home_team_goals": "2",
"away_team_goals": "1"
},
{
"date": "2022-04-30",
"season": "2021",
"home_team": "Tranmere Rovers",
"away_team": "Oldham Athletic",
"home_team_goals": "2",
"away_team_goals": "0"
},
{
"date": "2022-05-02",
"season": "2021",
"home_team": "Port Vale",
"away_team": "Newport County",
"home_team_goals": "1",
"away_team_goals": "2"
},
{
"date": "2022-05-02",
"season": "2021",
"home_team": "Salford City",
"away_team": "Mansfield Town",
"home_team_goals": "2",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Barrow",
"away_team": "Northampton Town",
"home_team_goals": "1",
"away_team_goals": "3"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Bradford City",
"away_team": "Carlisle United",
"home_team_goals": "2",
"away_team_goals": "0"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Bristol Rovers",
"away_team": "Scunthorpe United",
"home_team_goals": "7",
"away_team_goals": "0"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Exeter City",
"away_team": "Port Vale",
"home_team_goals": "0",
"away_team_goals": "1"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Harrogate Town A.F.C.",
"away_team": "Sutton United",
"home_team_goals": "0",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Hartlepool United",
"away_team": "Colchester United",
"home_team_goals": "0",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Leyton Orient",
"away_team": "Tranmere Rovers",
"home_team_goals": "0",
"away_team_goals": "1"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Mansfield Town",
"away_team": "Forest Green Rovers",
"home_team_goals": "2",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Newport County",
"away_team": "Rochdale",
"home_team_goals": "0",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Oldham Athletic",
"away_team": "Crawley Town",
"home_team_goals": "3",
"away_team_goals": "3"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Stevenage Borough",
"away_team": "Salford City",
"home_team_goals": "4",
"away_team_goals": "2"
},
{
"date": "2022-05-07",
"season": "2021",
"home_team": "Walsall",
"away_team": "Swindon Town",
"home_team_goals": "0",
"away_team_goals": "3"
}
],
"rows": 17,
"statistics":
{
"elapsed": 0.173464376,
"rows_read": 0,
"bytes_read": 0
}
}
