MySql
气象预报
CREATE TABLE MeteoForecast (
id BigInt(20) NOT NULL AUTO_INCREMENT,
localization_id BigInt(20) NOT NULL,
seasonal_forecast_id BigInt(20),
meteo_warning_id BigInt(20),
start_date DateTime NOT NULL,
end_date DateTime NOT NULL,
min_temp Float,
max_temp Float,
icon_link VarChar(255) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
PRIMARY KEY (
id
)
) ENGINE=InnoDB AUTO_INCREMENT=3 ROW_FORMAT=DYNAMIC DEFAULT CHARACTER SET latin1 COLLATE latin1_swedish_ci;
它包含以下数据:
id localization_id start_date end_date min_temp max_temp icon_link
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 1 18/09/2017 06:00:00 18/09/2017 12:00:00 15 24 Mostly_Cloudy_Icon.png
2 1 18/09/2017 12:00:00 18/09/2017 18:00:00 15 24 Light_Rain.png
3 1 19/09/2017 06:00:00 19/09/2017 12:00:00 12 22 Mostly_Cloudy_Icon.png
4 1 19/09/2017 12:00:00 19/09/2017 18:00:00 13 16 Mostly_Cloudy_Icon.png
5 1 20/09/2017 06:00:00 20/09/2017 12:00:00 18 26 Light_Rain.png
6 1 20/09/2017 12:00:00 20/09/2017 18:00:00 17 25 Light_Rain.png
它表示meteo预测,如您所见,它有开始日期时间和结束日期时间。因此,对于特定位置(由
本地化id
字段)我可以在同一天有更多记录(不同的小时范围,在示例中我创建了2个范围:从06:00到12:00和从12:00到18:00)。
我想从开始日期起2天内检索所有相关记录,因此我尝试这样做:
select * from MeteoForecast where
start_date between '18/09/2017 06:00:00' and '20/09/2017 06:00:00'
order by start_date desc;
但它给了我0条记录。
我也试过:
select * from MeteoForecast where
start_date >= '18/09/2017 06:00:00' and
end_date < '20/09/2017 18:00:00'
order by start_date desc;
有什么问题?我错过了什么?如何解决此问题?