JSONEachRow
Input | Output | Alias |
---|---|---|
✔ | ✔ | JSONLines , NDJSON |
说明
在这种格式中,ClickHouse 将每一行作为一个分隔的、以换行符分隔的 JSON 对象输出。
示例用法
插入数据
使用以下数据的 JSON 文件,命名为 football.json
:
{"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}
插入数据:
INSERT INTO football FROM INFILE 'football.json' FORMAT JSONEachRow;
读取数据
使用 JSONEachRow
格式读取数据:
SELECT *
FROM football
FORMAT JSONEachRow
输出将为 JSON 格式:
{"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}
如果设置 input_format_skip_unknown_fields 为 1,将跳过导入未知名称的数据列。