关系:产品(制造商、模型、类型)
我正设法找到价格最高的打印机。 我知道,我可以找到价格最高的打印机,但如果有多种胶卷(价格最高),我会怎样做。
我曾尝试过:
SELECT model FROM printer HAVING COUNT(*) >= 1 WHERE price > all;
我知道,这是一个可怕的企图,我仍在努力学习。 但是,当我完全停顿时,我可以做很多事情。
关系:产品(制造商、模型、类型)
我正设法找到价格最高的打印机。 我知道,我可以找到价格最高的打印机,但如果有多种胶卷(价格最高),我会怎样做。
我曾尝试过:
SELECT model FROM printer HAVING COUNT(*) >= 1 WHERE price > all;
我知道,这是一个可怕的企图,我仍在努力学习。 但是,当我完全停顿时,我可以做很多事情。
我不知道我是否理解你的需要:
SELECT model FROM printer
WHERE price = (SELECT MAX(price) FROM printers)
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