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Descripción

Se diferencia del formato JSON únicamente en que los campos de datos se devuelven como cadenas, no como valores JSON tipados.

Ejemplo de uso

Inserción de datos

Con un archivo JSON que contiene los siguientes datos, llamado 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"
            }
    ]
}
Inserta los datos:
INSERT INTO football FROM INFILE 'football.json' FORMAT JSONStrings;

Lectura de datos

Lea los datos con el formato JSONStrings:
SELECT *
FROM football
FORMAT JSONStrings
La salida estará en formato 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
    }
}

Configuración de formato

Última modificación el 10 de junio de 2026