问题描述
如果那是您的意思,Rhys的答案是正确的,但是您可能想在title
()中使用retail=MIN(retail)
,而该措辞建议了如何获得该答案:
SELECT title, retail
FROM books
WHERE category = 'COmpuTER'
AND retail = (SELECT MIN(retail) FROM books WHERE category = 'COmpuTER')
为了减少重复,可以使用WITH
子句(如果使用的是最新版本的sql):
;WITH ComputerBooks AS (
SELECT title, retail
FROM books
WHERE category = 'COmpuTER')
SELECT title, retail
FROM ComputerBooks
WHERE retail = (SELECT MIN(retail) FROM ComputerBooks)
解决方法
SELECT MIN(retail)
FROM books
WHERE category = ‘COMPUTER’
效果很好,但是当我在select中包含标题时,例如:
SELECT MIN(retail),title
FROM books
WHERE category = 'COMPUTER'
没有。为什么?如何使其运作?