獲取最近的/最低的日期SQL

Question

我有四個日期用不同的價格對於每一日期：

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' 

問題：該查詢返回結果爲$ 25和$ 50我需要它給我只有最近的日期...
我怎麼能它只返回$ 50？

Answer 1

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

Answer 2

試試這個（在SQL Server）

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

試試這個（在MySQL的）

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