[英]Select the rows where Balance is greater than 10000 and expiration date is less than 2 days from today
我有下表:
[ID] [所有者] [余额] [CreationDate] [ExpirationDate]
到目前为止,代码如下。
CREATE TABLE Account(ID INTEGER PRIMARY KEY AUTOINCREMENT,
Owner varchar(50),
Balance decimal(7,3),
CreationDate timestamp DEFAULT CURRENT_TIMESTAMP,
ExpirationDate timestamp DATETIME NOT NULL DEFAULT CURDATE)
INSERT INTO Account(Owner, Balance, ExpirationDate)
Values('Jean Claude Van Damme', 6453, '2023-10-06'),
('Peter Paul Rubens', 9999, '2018-06-04'),
('Rembrandt Harmenszoon van Rijn', 765549, '2023-10-22'),
('Pablo Ruiz y Picasso', 972825, '2019-06-13'),
('Michelangelo di Lodovico Buonarroti', 7981, '2022-10-27'),
('Raffaello Sanzio da Urbino', 548765, '2018-11-17'),
('John Doe', 666745, '2021-12-05'),
('Mickey Mouse', 10005, '2020-10-21'),
('Vincent Willem van Gogh', 453906, '2021-07-13'),
('Oliver Hardy', 1005, '2019-01-26')
SELECT * FROM Account
SELECT Owner FROM Account WHERE Balance < 10000
首先,我不知道'ExpirationDate时间戳DATETIME NOT NULL DEFAULT GETDATE'是否遵守有关日期格式的mysql语法。 是yyyy / mm / dd还是mm / dd / yyyy? 我知道日期可以转换为欧洲标准,但这对我不感兴趣。
第二。 我必须“从今天开始选择余额大于1000并且到期日期小于2天的行。
显然,我会采取简单的方法添加到我的代码中
SELECT Owner FROM Account
WHERE Balance >= 10000 AND ExpirationDate BETWEEN '2017-04-20' AND '2017-04-22'
但
我想从CURRENT_DATE算起日期,无论何时,例如
SELECT Owner FROM Account
WHERE Balance >= 10000 AND ExpirationDate BETWEEN CURDATE() AND INTERVAL 2 DAY)
我也尝试过
SELECT Owner FROM Account
WHERE Balance >= 10000 AND ExpirationDate = DATE_ADD(CURDATE(), INTERVAL 2 DAY);
SELECT Owner FROM Account
WHERE Balance >= 10000 AND DATE_SUB(GETDATE(), INTERVAL 10 DAY);
不用说这两种方法都不起作用。
如前所述,您的DDL不正确。
这是针对WebSQL / SQLLite的更正DDL,以及供您学习的查询。
CREATE TABLE Account(
ID INTEGER PRIMARY KEY,
Owner varchar(50),
Balance decimal(10,3),
CreationDate timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
ExpirationDate timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
);
INSERT INTO Account(Owner, Balance, ExpirationDate) Values
('Jean Claude Van Damme', 6453, '2023-10-06'),
('Peter Paul Rubens', 9999, '2018-06-04'),
('Rembrandt Harmenszoon van Rijn', 765549, '2023-10-22'),
('Pablo Ruiz y Picasso', 972825, '2019-06-13'),
('Michelangelo di Lodovico Buonarroti', 7981, '2022-10-27'),
('Raffaello Sanzio da Urbino', 548765, '2018-11-17'),
('John Doe', 666745, '2021-12-05'),
('Mickey Mouse', 10005, '2020-10-21'),
('Vincent Willem van Gogh', 453906, '2021-07-13'),
('Oliver Hardy', 1005, '2019-01-26');
SELECT * FROM Account
WHERE Balance >= 10000
AND ExpirationDate > DATE()
AND ExpirationDate < DATE('now','+2 day')
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