我的SQL查询顺序，因此列中没有相同的值

Question

I m fetching data from multiple tables and want to sort the result so that no two values come together.

for example query returns the following data.

23

25

26

26

22

22

19

I want this result to be ordered like this so that no two values come consuctivley.

23

25

26

22

26

22

19

Answer 1

You actually cannot guarantee that no two values come together (for instance, all values might be the same). But you can distribute them. Here is a method using a subquery and variables:

select t.*
from (select q.*,
             (@rn := if(@v = col, @rn + 1,
                        if(@v := col, 1, 1)
                       )
             ) as rn
      from (query) q cross join
           (select @v := -1, @rn := 0) vars
      order by col
     ) t
order by rn, col;