I have a table as follows:
- user_id (key)
- user_email_addr ess (text)
- user_request_da te (text)
- user_sent_date (time/date)
An automated macro will run every 5 minutes and needs to run a SQL UPDATE
that:
- finds the FIRST (ONE ROW ONLY) (youngest) record where
- user_request_da te is the most recent
- AND user_sent_date is NULL (i.e. blank)
- THEN UPDATES the user_sent_date for THAT record to NOW() (i.e. the
current system date/time)
For example:
- record 33 - request_date 01-JUL-03 14:55:03 - user_sent_date = NULL
- record 34 - request_date 01-JUL-03 15:03:46 - user_sent_date = NULL
- record 35 - request_date 01-JUL-03 16:08:08 - user_sent_date = NULL
- record 36 - request_date 01-JUL-03 16:57:31 - user_sent_date = NULL
- record 37 - request_date 01-JUL-03 17:11:41 - user_sent_date = NULL
SO - the above NEEDED SQL UPDATE would update ONLY row 33 (the FIRST ROW)
- update record 33 - with NOW() time and date
THEN record 34, then 35, then 36, then 37
ONE ROW at a time per each SQL UPDATE
Any ideas!?
Thanks!
Richard
richard @ rcbuchanan . com 1 8791
Richard,
Try something like
update Richard set
user_sent_date = getdate()
where user_id = (
select top 1 user_id from Richard R
where R.user_sent_dat e is null
order by user_request_da te
)
Your narrative and your example don't agree on whether
you want the most recent (youngest), or least recent (oldest)
user_request_da te, so you may need to add DESC to the
order by clause.
Steve Kass
Drew University
Richard C Buchanan wrote: I have a table as follows:
- user_id (key) - user_email_addr ess (text) - user_request_da te (text) - user_sent_date (time/date)
An automated macro will run every 5 minutes and needs to run a SQL UPDATE that:
- finds the FIRST (ONE ROW ONLY) (youngest) record where - user_request_da te is the most recent - AND user_sent_date is NULL (i.e. blank)
- THEN UPDATES the user_sent_date for THAT record to NOW() (i.e. the current system date/time)
For example:
- record 33 - request_date 01-JUL-03 14:55:03 - user_sent_date = NULL - record 34 - request_date 01-JUL-03 15:03:46 - user_sent_date = NULL - record 35 - request_date 01-JUL-03 16:08:08 - user_sent_date = NULL - record 36 - request_date 01-JUL-03 16:57:31 - user_sent_date = NULL - record 37 - request_date 01-JUL-03 17:11:41 - user_sent_date = NULL
SO - the above NEEDED SQL UPDATE would update ONLY row 33 (the FIRST ROW)
- update record 33 - with NOW() time and date THEN record 34, then 35, then 36, then 37 ONE ROW at a time per each SQL UPDATE Any ideas!? Thanks! Richard
richard @ rcbuchanan . com
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