获取最近/最低日期SQL

Question

我有四个日期，每个日期的价格不同：

10/01/2011  $25
10/08/2011  $50
11/17/2011  $100
12/23/2011  $150

SQL：

SELECT price FROM MyTable WHERE MyDate <= '10/12/2011'

问题：此查询返回$ 25和$ 50。我需要它才能给我最近的日期...
我怎么能只返回50美元？

Answer 1

SELECT top 1 price FROM MyTable WHERE MyDate <= '10/12/2011' order by MyDate desc

Answer 2

试试这个（在SQL Server中）

SELECT TOP 1 price
FROM MyTable
WHERE myDate <= getDate() 
ORDER BY myDate DESC

试试这个（在mySQL中）

SELECT price
FROM MyTable
WHERE myDate <= now()
ORDER BY myDate DESC
LIMIT 1