您好我正试图从MySQL数据库中提取一些记录,我已尝试解决方案,例如:
SELECT o.id_order, o.reference, o.id_customer, DATE_FORMAT(o.invoice_date, '%m%d%y') AS 'invoice_date'
FROM ps_orders AS o
WHERE DATE(o.invoice_date) = CURDATE() - INTERVAL 100 DAY;
或
SELECT o.id_order, o.reference, o.id_customer, o.invoice_date
FROM ps_orders AS o
WHERE o.invoice_date = DATE_SUB(CURDATE(), INTERVAL 30 DAY);
但我一直得到0结果。
格式:
o.invoice_date
是2013-04-06 02:02:12(YYYY-MM-DD HH:II:SS)。
我不知道为什么我一直得到0结果。当我尝试使用此查询时:
SELECT o.id_order, o.reference, o.id_customer, o.invoice_date
FROM ps_orders AS o
WHERE o.invoice_date < CURDATE() - INTERVAL 30 DAY
ORDER BY o.invoice_date DESC;
有效,但我只想从 x DAY前(完全)获取数据。有人能指出我正确的方向。谢谢你的帮助...
答案 0 :(得分:0)
最好的方法是:
WHERE o.invoice_date >= CURDATE() - INTERVAL 30 DAY AND
o.invoice_date < CURDATE() - INTERVAL 29 DAY
这允许查询引擎在o.invoice_date
上使用索引。