Hi,
Try just :
SELECT id_secr_rqst task_id, MAX(dt_aud_rec) AS latest
FROM isr2_aud_log WHERE
name_rec_type = 'Assignment' AND id_secr_rqst
='TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF'
GROUP BY id_secr_rqst
;
+------------------------------------------------+---------------------+
| task_id | latest |
+------------------------------------------------+---------------------+
| TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:39:29 |
+------------------------------------------------+---------------------+
1 row in set (0.02 sec)
Mathias
Selon Anoop kumar V <[EMAIL PROTECTED]>:
> Hi mysql-ers,
>
> I need help in a basic query:
>
> I have this table:
>
> select * from isr2_aud_log where
> id_secr_rqst IN ('TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF')
> --and name_rec_type = 'Assignment'
> order by id_secr_rqst, dt_aud_rec
>
>
+------------------------------------------------+---------------------+---------------------+
> | id_secr_rqst | dt_aud_rec | name_rec_type |
>
+------------------------------------------------+---------------------+---------------------+
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:30:46 |
> Submission |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:30:46 |
> Exception Requested |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:30:46 |
> Exception Resource |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:33:22 |
> Director Approval |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:34:43 |
> Assignment |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:35:03 |
> Risk Assessment |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:36:03 |
> Assignment |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:37:40 |
> SERB Approval |
> | TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF | 2005-05-20 14:39:29 |
> Assignment |
>
+------------------------------------------------+---------------------+---------------------+
>
> and i am using this query:
>
> SELECT t1.id_secr_rqst task_id, MAX(t2.dt_aud_rec) AS latest,
> t1.dt_aud_recAS date1
> FROM isr2_aud_log t1, isr2_aud_log t2 WHERE t1.id_secr_rqst =
> t2.id_secr_rqst
> AND t1.name_rec_type = 'Assignment' AND
> t1.id_secr_rqst IN (
> 'TASK23C6054B9D416C08:1284FD4:103FB047DF1:-7ECF')
> GROUP BY t2.id_secr_rqst HAVING date1 = latest
>
> What I expected to get is the id_secr_rqst which has the last name_rec_type
> = 'Assignment'
> In this case there is only one id_secr_rqst and it has the last
> name_rec_type as 'Assignment'. But I do not seem to get consistent results.
> As I am using an older version of mysql I do not have the liberty to use
> subqueries and will have to do everything using joins only.
>
> The problem I am facing is that this query only sometimes returns rows and
> most of the time I get an empty result set. This table does not have any
> primary keys.
>
> Can somebody please point out what is the mistake I am doing - I think it
> just needs a tweak here and there (I hope..)
>
> Thanks,
> Anoop
>
> --
> Thanks and best regards,
> Anoop
>
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