Question

我正在从Mongodb迁移，看看如何使用jsonb类型按范围选择，我每天有~2.880.000记录，我需要按站和日期字段查询数据库，我知道如何按时间范围选择

SELECT * FROM stations WHERE date >= '2014-02-01' AND date <  '2014-03-01 AND station = 'AA01'

但我不知道如何使用JSONB数据类型查询数据库。

CREATE TABLE stations (
  id SERIAL PRIMARY KEY,
  event JSONB
);

INSERT INTO test(event) VALUES('{"station":"AA01","value":2.31,"date":"2015-01-23 18:02:48.906569865 +0000 UTC"}');
INSERT INTO test(event) VALUES('{"station":"AA02","value":4.1,"date":"2015-01-23 19:02:48.906569865 +0000 UTC"}');

此外，我想知道如何获得良好的性能方法，谢谢。

Answer 1

SELECT *
FROM stations
WHERE to_date(event->>'date', 'YYYY-MM-DD') 
    BETWEEN '2014-02-01' 
    AND     '2014-03-01'
AND event->>'station' = 'AA01';

Postgresql 9.4 JSONB类型，按日期范围选择

1 个答案: