MySql - 获取Min,Max和3个随机行

Question

我想要一个MySql查询获得5行,其中包括最小价格行,最大价格行和其他3个随机行.

表:

ID  Product Price
1   data    2
2   data    20
3   data    55
4   data    24
5   data    2
6   data    15
7   data    10
8   data    33
9   data    3
10  data    30

预期结果(随机3行)

ID  Product Price
1   data    2
3   data    55
4   data    24
6   data    15
7   data    10

任何帮助将不胜感激!

Answer 1

SELECT table.*
  FROM table
     , ( SELECT @minPrice := ( SELECT min(Price) FROM table ) minPrice
              , @minId    := ( SELECT id FROM table WHERE Price = @minPrice ORDER BY rand() LIMIT 1 )
              , @maxPrice := ( SELECT max(Price) FROM table ) maxPrice
              , @maxId    := ( SELECT id FROM table WHERE Price = @maxPrice ORDER BY rand() LIMIT 1 )
       ) tmp
  WHERE table.id in (@minId,@maxId)
UNION
(SELECT *
   FROM table
   WHERE Price not in (@minPrice,@maxPrice)
   ORDER BY rand()
   LIMIT 3
)

Answer 2

你可以这样做,

select * from table order by Price asc limit 0,1
union all
select * from table order by Price desc limit 0,1 
union all
select * from table order by RAND()  limit 0,3