MySQL WHERE 最近的行列在加入的特定日期之后 table？

Question

我正在尝试缩小查询结果集的范围，我可以通过检查审计来减少这一点的一种方法 table foo_status，当特定列 barStatus 已设置为“实时”。

富table

+--------+----------+-----------+---------------------+
|   id   |  status  | barStatus |       created       |
+--------+----------+-----------+---------------------+
| 120534 | LIVE     | LIVE      | 13/02/2021 13:21:04 |
+--------+----------+-----------+---------------------+

基本上基数是（一个 Foo -- 有很多 --> Foo 状态更新）

table 记录 foo 状态随时间变化的时间，例如

+------+-------------------+-------------------+-------+------------------+------------+--------+
|id    |createdOn          |modifiedOn         |version|status            |barStatus   |foo_id  |
+------+-------------------+-------------------+-------+------------------+------------+--------+
|213423|2018-09-02 03:21:56|2018-09-02 03:21:56|0      |ACTIVATED         |UNSURE      |120534  |
|213424|2018-09-02 03:30:22|2018-09-02 03:30:22|0      |REGISTERED        |UNSURE      |120534  |
|213425|2018-09-02 03:30:22|2018-09-02 03:30:22|0      |AWAITING_INTERVIEW|UNSURE      |120534  |
|215396|2018-09-07 10:16:58|2018-09-07 10:16:58|0      |INVITED_TO_JOIN   |UNSURE      |120534  |
|215601|2018-09-07 21:09:13|2018-09-07 21:09:13|0      |INVITED_TO_JOIN   |DBS_RECEIVED|120534  |
|215603|2018-09-07 21:17:12|2018-09-07 21:17:12|0      |READY_FOR_LIVE    |DBS_RECEIVED|120534  |
|218345|2018-09-14 14:42:22|2018-09-14 14:42:22|0      |READY_FOR_LIVE    |LIVE        |120534  |
|218351|2021-02-14 14:45:21|2018-09-14 14:45:21|0      |LIVE              |LIVE        |120534  |
+------+-------------------+-------------------+-------+------------------+------------+--------+

我想限制当 foo 在 5 天内 barStatus 变成 LIVE 时的结果集

然而我当前的查询returns没有结果

select count(foo.id)
from foos foo
         left join foo_status_updates fsu on fsu.foo_id = foo.id
where fs.id = 1
  and (foo.currentlyUnavailable IS FALSE)
  and (foo.status in ('READY_FOR_LIVE', 'LIVE'))
  and foo.barStatus = 'LIVE'
  and (SELECT createdOn
       FROM foo_status_updates fsu
       WHERE foo_id = foo.id
         AND barStatus = 'LIVE'
       ORDER BY createdOn
       LIMIT 1) > DATE_SUB(NOW(), INTERVAL 5 DAY)

总而言之，我只想取回最近（5 天内）barStatus 设置为 LIVE 的 Foo 记录

我是否需要 select JOIN 子句中的最新列？

Answer 1

在我看来 AND (SELECT 位应该是

AND foo.id in (
   SELECT foo_id 
   FROM foo_status_updates 
   WHERE createdOn > DATE_SUB(NOW(), INTERVAL 5 DAY)
   AND barStatus = 'Live'
)

MySQL WHERE 最近的行列在加入的特定日期之后 table？

MySQL WHERE most recent row column is after a specific date in a joined table?

mysql

inner-join