JSONCompactEachRowWithNames - ClickHouse Documentation

Entrée	Sortie	Alias
✔	✔

Description

La différence avec le format JSONCompactEachRow est qu’il affiche également la ligne d’en-tête avec les noms de colonnes, à l’instar du format TabSeparatedWithNames.

Exemple d’utilisation

Insertion de données

À l’aide d’un fichier JSON nommé football.json et contenant les données suivantes :

["date", "season", "home_team", "away_team", "home_team_goals", "away_team_goals"]
["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]

Insérez les données :

INSERT INTO football FROM INFILE 'football.json' FORMAT JSONCompactEachRowWithNames;

Lecture des données

Lisez les données au format JSONCompactEachRowWithNames :

SELECT *
FROM football
FORMAT JSONCompactEachRowWithNames

Le résultat sera au format JSON :

["date", "season", "home_team", "away_team", "home_team_goals", "away_team_goals"]
["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]

Paramètres de format

Si le paramètre input_format_with_names_use_header est défini sur 1, les colonnes des données d’entrée seront mises en correspondance avec les colonnes de la table en fonction de leur nom, et les colonnes dont le nom est inconnu seront ignorées si le paramètre input_format_skip_unknown_fields est défini sur 1. Sinon, la première ligne sera ignorée.

​Description

​Exemple d’utilisation

​Insertion de données

​Lecture des données

​Paramètres de format

Description

Exemple d’utilisation

Insertion de données

Lecture des données

Paramètres de format