is it possible to do an update with a nested select that references the outer update ?
A typo in a webapp left ~150 records damaged overnight
I was hoping to automate this, but may just use regex to make update
statements for this
basically , i have this situation:
table a ( main record )
id , id_field , fullname
table b ( extended profiles )
id_field , last_name , first_name, middle_name , age , etc
id_field on table a was left null due to a typo with the orm
i've tried many variations to automate it, none seem to work
i think this attempt most clearly expresses what I was trying to do
UPDATE table_a a set id_field = ( SELECT id_field FROM table_b b
WHERE a.first_name || ' ' || b.last_name = a.fullname ) WHERE id_field
IS NULL ;
I'd be greatful if anyone has a pointer
On 6 Oct 2009, at 18:57, Jonathan Vanasco wrote:
i think this attempt most clearly expresses what I was trying to do
UPDATE table_a a set id_field = ( SELECT id_field FROM table_b b
WHERE a.first_name || ' ' || b.last_name = a.fullname ) WHERE
id_field IS NULL ;I'd be greatful if anyone has a pointer
You're looking for UPDATE FROM:
UPDATE table_a SET id_field = table_b.id_field FROM table_b WHERE
table_a.firstname || ' ' || table_b.last_name = table_a.fullname AND
table_a.id_field IS NULL;
Apparently table_a.id_field is not a primary key? Seems a bit weird to
me, but if it floats your boat...
Alban Hertroys
--
Screwing up is the best way to attach something to the ceiling.
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