Mysql 是的。 SELECT s.beer FROM sells s WHERE NOT EXISTS (SELECT si.beer FROM sells si WHERE si.price <= s.price) ... WHERE si.price

是的。

SELECT s.beer
FROM sells s
WHERE NOT EXISTS (SELECT si.beer
FROM sells si
WHERE si.price <= s.price) 

...
WHERE si.price < s.price) 

SELECT beer
FROM sells s
WHERE NOT EXISTS (
    SELECT *
    FROM sells  -- no alias needed
    WHERE price <= s.price)

SELECT beer
FROM sells
WHERE price = (SELECT min(price) FROM sells)

select beer
FROM sells
ORDER BY price
LIMIT 1

select beer
FROM sells
ORDER BY price, beer
LIMIT 1

SELECT s.beer, s.price
FROM sells s
GROUP BY s.beer
HAVING s.price = MIN(s.price)

select *
from sells
order by price
limit 1

SELECT bar, beer, price FROM sells ORDER BY price ASC LIMIT 1