asked on

Update on same table with criteria on records

Hi, I would like to update a record (e.g.: record 3) on Access table with a criteria in another record (e.g. record 1).

So in this case, for a matching ID in A, with the STATUS "DEL", I will need to update the DOC field of both record 1 and record 3 to a new value "D", & copy the INFO field from record 1 (old data) to record 3 (new data).

E.G.:

UID - ID - STATUS - DOC - INFO
1 - A - APP - C - XXX
2 - B - APP - C - XXX
3 - A - DEL - NULL - NULL
4 - C - APP - C - XXX
5 - D - APP - C - XXX

Must it be done using 2 tables to compare?

imitchie

try this. assumes that you won't have more than 2 of the same ID

update d set doc = 'D', info = d.info
from
(
select a.id, a.info
from mytable a, mytable b
where a.id = b.id and b.status = 'DEL'
) c, mytable d
where d.id = c.id

Open in new window

cukcuk

ASKER

I tried to run the update, and it returns a
Syntax error (missing operator) in query expression 'D' ......

Does Access support the FROM method?

imitchie

sorry! please use double quotes

update d set doc = "D", info = d.info
from
(
select a.id, a.info
from mytable a, mytable b
where a.id = b.id and b.status = "DEL"
) c, mytable d
where d.id = c.id

cukcuk

ASKER

I'm still having the same error after changing to double quotes...

BTW, i'm using Access's Queries Object to type the SQL and tries to view in Datasheet view..

ASKER CERTIFIED SOLUTION

imitchie

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

cukcuk

ASKER

Hey it works... thanks..

But in my case.. it is abit more complicated..

It might have more than 1 DEL & APP. So the latest DEL record must be able to retrieve the data from the earliest APP record.

Would it be easier to deal with using a duplicate table of the existing one? Please advise...

e.g.:

UID - ID - STATUS - DOC - INFO
1 - A - APP - C - XXX
2 - B - APP - C - XXX
3 - A - DEL - NULL - NULL
4 - C - APP - C - XXX
5 - D - APP - C - XXX

will become

UID - ID - STATUS - DOC - INFO
1 - A - APP - D - XXX (updated)
2 - B - APP - C - XXX
3 - A - DEL - D - XXX (updated)
4 - C - APP - C - XXX
5 - D - APP - C - XXX
6 - A - APP - C - XXX (newly added record)
7 - A - DEL - NULL - NULL (newly added record)

will become

UID - ID - STATUS - DOC - INFO
1 - A - APP - D - XXX
2 - B - APP - C - XXX
3 - A - DEL - D - XXX
4 - C - APP - C - XXX
5 - D - APP - C - XXX
6 - A - APP - D - XXX (updated)
7 - A - DEL - D - XXX (updated using record 1)

imitchie

you're stretching MS Access... I'm sorry but I'm at the end of my ability with this!

cukcuk

ASKER

helpful! =)

cukcuk

ASKER

Hmm... thanks for helping imitchie.

Guess i'll need to find my way with your solution provided..