如何在單行中獲取最小值和最大值以及對應的ID

Question

我有一個名為product的表格，其中包含3個字段：

prod_id  price  pname
1        100    abc
2        200    bbc
3        300    cbc

我想在一行中獲取最小值和最大值的數據，即：

 minprice  prod_id1   maxprice   prod_id2
 100       1          300        3

我嘗試使用以下查詢，但無法找到確切結果（如果我有更多數據）

SELECT s1.prod_id as prod_id1, 
       s2.prod_id as prod_id2, 
       min(s1.price) as minprice,
       max(s2.price) as maxprice 
FROM product s1
INNER JOIN product s2 ON s1.prod_id = s2.prod_id

Answer 1

您可以使用LIMIT來做到這一點：

SELECT
    pmin.price AS minprice, 
    pmin.prod_id AS minprice_prodid,
    pmax.price AS maxprice,
    pmax.prod_id AS maxprice_prodid
FROM (
    SELECT prod_id, price FROM product ORDER BY price LIMIT 1
) pmin
CROSS JOIN (
    SELECT prod_id, price FROM product ORDER BY price DESC LIMIT 1
) pmax

Answer 2

您可以在下面嘗試-

select X.id as prod_id1, minprice, Y.id as prod_id2, maxprice
from
(
select id, price as minprice from tablename
where price =(select min(price) from tablename b)
)X cross join
(
select id, price as maxprice from tablename
where price =(select max(price) from tablename c)
)Y

Answer 3

SELECT s1.prod_id as prod_id1, 
       s2.prod_id as prod_id2, 
       s1.price as maxprice,
       s2.price as minprice 
FROM products s1
INNER JOIN products s2 ON s1.price > s2.price
order by s1.price desc, s2.price asc
limit 1

演示版