Hi, On Sat, Jan 16, 2016 at 12:58 AM, audio muze <audiomuze at gmail.com> wrote: > Apologies if I'm asking an obvious question, but I've searched and > tried various options and have not been able to arrive at an UPDATE > statement in SQLite that does what I need. > > I've two tables with a unique identifier that enables me to link them. > I'm wanting to update the values of a particular field in table > "target" with the contents of a corresponding field in table "source" > where the corresponding field in table "source" is not null. > > target [ID, resource] > source [ID, resource] > > Both tables are indexed on ID, which is a unique identifier > There may or may not be a record with a matching ID in table "source" > Where the ID's match (and resource in "source" is not NULL) I want to > overwrite the corresponding resource field in "target" with the > content of the resource field of the matching record of "source" > > I've tried the following statement, but the end result is all records > in target get the same resource value written: > > UPDATE target > SET resource = ( > SELECT t.resource FROM target t > WHERE ( t.ID = ID AND t.resource IS NOT NULL ) > );
Is it a typo in inner query or you ARE asking for a resource from target? Thank you. > _______________________________________________ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
