MySQL中行之间的区别

Question

I would like to generate a new table in mysql which contains the difference between every two rows.. For example, if I have this table:

table1:

ID     VALUE

1      16748 
1      19628
1      23245
1      23322
1      33399
2      15367
2      17839
2      34578
2      53421
3      14229
3      19533
........

I would like to get the difference between 2 consecutive values (row[x+1]-row[x]), for all values per ID

So my result would be:

ID      DIFF

1       2880
1       3617
1       77
1       10077
2       2472
2       16739
2       18843
3       5304

Answer 1

You can try something like this:-

SELECT
    MIN(T2.VALUE- T1.VALUE) AS Dif
FROM
    Table T1 INNER JOIN Table T2 on T1.VALUE< T2.VALUE
ORDER BY
    T1.VALUE

Answer 2

您可以通过将表与其自身连接来完成此操作。

SELECT (first.value - second.value) AS differ FROM `table` AS first JOIN `table` AS second WHERE first.id + 1 = second.id