T wrote:
In case the original question has been clouded by discussions of
running a general store and the arson habits of the Hand Crafted
Guild, allow me to crystalize my purely SQLite question:
I know I can update via:
update Table1
set
c1 = (select d1 from Table2 where Table2.id = desired_id)
, c2 = (select d2 from Table2 where Table2.id = desired_id)
, c3 = (select d3 from Table2 where Table2.id = desired_id)
, cn = (select dn from Table2 where Table2.id = desired_id)
where
rowid = desired_rowid
But that executes the same where clause n times, so scans through
Table2 for a to find the same matching row n times.
Is it possible to construct an update that executes a where clause
once to locate all of the desired columns?
The obvious solution would be to do it programatically, however, I'm
guessing that doesn't meet your needs?
John
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