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MS access and Update/Select

Posted on 2016-11-02
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Last Modified: 2016-11-03
How can I do something like below in MS access, where I'm updating a record in the  equipment table based on a related record in th e same equipment table.  

update equipment set local_indicator_id = (select local_id from equipment where id = 8309)  
where equipment.id = 8265
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Question by:HLRosenberger
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Assisted Solution

by:Rey Obrero (Capricorn1)
Rey Obrero (Capricorn1) earned 250 total points
ID: 41871067
try
update equipment set local_indicator_id = (select local_id from equipment As E where E.id = 8309)  
 where equipment.id = 8265
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PatHartman earned 250 total points
ID: 41871114
Open the QBE.
Add the equipment table twice.  The second instance will be suffixed with "_1".  This is just an alias
Draw join lines between the two tables.
Add selection criteria if necessary.
Select the column you want to update.
Change the query type to Update.
In the Update To line, type the name of the column that contains the data you want in the format -
[tablename].[columnname]
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Expert Comment

by:hnasr
ID: 41871164
Other approach: to avoid hard coding the query.

Create a table u(f, t) with entries from id to id

f          t
8265 8309
------  ------

UPDATE  equipment  inner join u on equipment .local_indicator_id=u.f
set equipment .local_indicator_id =u.t
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Assisted Solution

by:PatHartman
PatHartman earned 250 total points
ID: 41871221
I don't think the OP actually wants to have literals in the query.  Parameters perhaps, but not literals.  However, if there is no field on which to join the two instances, then a cross reference table might be needed.
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Author Closing Comment

by:HLRosenberger
ID: 41872029
Thanks!
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