Question

我在数据库中有一系列条目，其中一个是时间戳。我希望将当前行的时间戳与其前一行之间的差异添加为字段。

Row ID      TimeStamp    
1   601S    1459223437   
2   602S    1459224049   
3   603S    1459224139   
4   604S    1459224255   
5   606S    1459224332   
6   607S    1459224406   
7   608S    1459224510   
8   609S    1459224596   
9   610S    1459224680

我喜欢什么

Row ID      TimeStamp    Difference
1   601     1459223437   n/a
2   602     1459224049   612
3   603     1459224139   90
4   604     1459224255   116
5   606     1459224332   77
6   607     1459224406   74
7   608     1459224510   104
8   609     1459224596   86
9   610     1459224680   84

Answer 1

SELECT id, ts, ts - prev_ts AS diff FROM (
  SELECT id, ts, LAG(ts) OVER(ORDER BY ts) AS prev_ts FROM 
    (SELECT 601 AS id, 1459223437 AS ts),
    (SELECT 602 AS id, 1459224049 AS ts),
    (SELECT 603 AS id, 1459224139 AS ts),
    (SELECT 604 AS id, 1459224255 AS ts),
    (SELECT 606 AS id, 1459224332 AS ts),
    (SELECT 607 AS id, 1459224406 AS ts),
    (SELECT 608 AS id, 1459224510 AS ts),
    (SELECT 609 AS id, 1459224596 AS ts),
    (SELECT 610 AS id, 1459224680 AS ts)
)

获取BigQuery中连续行之间的时间戳差异？

1 个答案: