MySql - How get value in previous row and value in next row? [duplicate]

Answer 1

Here's my solution may suit you:

SELECT * FROM Example
WHERE id IN (
(SELECT MIN(id) FROM Example WHERE id > 3),(SELECT MAX(id) FROM Example WHERE id < 3)
)

Demo: http://sqlfiddle.com/#!9/36c1d/2

Answer 2

This query uses a user defined variable to calculate the distance from the target id, and a series of wrapper queries to get the results you want. Only one pass is made over the table, so it should perform well.

select * from (
    select id, value from (
        select *, (@x := ifnull(@x, 0) + if(id > 3, -1, 1)) row from (
            select * from mytable order by id
        ) x 
    ) y
    order by row desc
    limit 3
) z
order by id

See an SQLFiddle

If you don't care about the final row order you can omit the outer-most wrapper query.