计算日期范围内的天数？

Question

我有这样的查询:

SELECT COUNT(*) AS amount
FROM daily_individual_tracking
WHERE sales = 'YES'
AND daily_individual_tracking_date BETWEEN '2010-01-01' AND '2010-03-31'

我是从日期范围中选出的.有没有办法获得日期范围内的总天数？

Answer 1

如果你正在寻找,不是很清楚

DATEDIFF('2010-03-31', '2010-01-01')

要么

COUNT(DISTINCT daily_individual_racking_date)