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

Answer 1

A solution would be to use temporary variables:

select 
    @prev as previous,
    e.id,
    @prev := e.value as current
from
    (
        select
            @prev := null
    ) as i,
    example as e
order by
    e.id

To get the "next" value, repeat the procedure. Here is an example:

select 
  id, previous, current, next
from
  (
    select
      @next as next,
      @next := current as current,
      previous,
      id
    from
      (
        select @next := null
      ) as init,
      (
        select
          @prev as previous,
          @prev := e.value as current,
          e.id
        from
          (
            select @prev := null
          ) as init,
          example as e
        order by e.id
      ) as a
    order by
      a.id desc
  ) as b
order by
  id

Check the example on SQL Fiddle

May be overkill, but it may help you

Answer 2

If you do not have an ID this has worked for me.

Next:

SELECT * FROM table_name
WHERE column_name > current_column_data
ORDER BY column_name ASC
LIMIT 1

Previous:

SELECT * FROM table_name
WHERE column_name < current_column_data
ORDER BY column_name DESC
LIMIT 1

I use this for a membership list where the search is on the last name of the member. As long as you have the data from the current record it works fine.

Answer 3

Select the next row below:

SELECT * FROM Example WHERE id < 3 ORDER BY id DESC LIMIT 1

Select the next row above:

SELECT * FROM Example WHERE id > 3 ORDER BY id LIMIT 1

Select both in one query, e.g. use UNION:

(SELECT * FROM Example WHERE id < 3 ORDER BY id DESC LIMIT 1)
 UNION
(SELECT * FROM Example WHERE id > 3 ORDER BY id LIMIT 1)

That what you mean?

Answer 4

SELECT *,
       (SELECT value FROM example e1 WHERE e1.id < e.id ORDER BY id DESC LIMIT 1 OFFSET 0) as prev_value,
       (SELECT value FROM example e2 WHERE e2.id > e.id ORDER BY id ASC LIMIT 1 OFFSET 0) as next_value
FROM example e
WHERE id=3;

And you can place your own offset after OFFSET keyword if you want to select records with higher offsets for next and previous values from the selected record.

Answer 5

please try this sqlFiddle

SELECT value,
       (SELECT value FROM example e2
        WHERE e2.value < e1.value
        ORDER BY value DESC LIMIT 1) as previous_value,
       (SELECT value FROM example e3
        WHERE e3.value > e1.value
        ORDER BY value ASC LIMIT 1) as next_value
FROM example e1
WHERE id = 3

Edit: OP mentioned to grab value of previous id and value of next id in one of the comments so the code is here SQLFiddle

SELECT value,
      (SELECT value FROM example e2
       WHERE e2.id < e1.id
       ORDER BY id DESC LIMIT 1) as previous_value,
      (SELECT value FROM example e3
       WHERE e3.id > e1.id
       ORDER BY id ASC LIMIT 1) as next_value
FROM example e1
WHERE id = 3

Answer 6

A possible solution if you need it all in one row

SELECT t.id, t.value, prev_id, p.value prev_value, next_id, n.value next_value
  FROM
(
  SELECT t.id, t.value,
  (
    SELECT id
      FROM table1
     WHERE id < t.id
     ORDER BY id DESC
     LIMIT 1
  ) prev_id,
  (
    SELECT id
      FROM table1
     WHERE id > t.id
     ORDER BY id
     LIMIT 1
  ) next_id
    FROM table1 t
   WHERE t.id = 3
) t LEFT JOIN table1 p
     ON t.prev_id = p.id LEFT JOIN table1 n
     ON t.next_id = n.id 

Sample output:

| ID | VALUE | PREV_ID | PREV_VALUE | NEXT_ID | NEXT_VALUE |
|----|-------|---------|------------|---------|------------|
|  3 |   200 |       2 |        150 |       4 |        250 |

Here is SQLFiddle demo