Both Postgres and MySQL allow using a join in an update statements.
For example, in Postgres I could do:
update totals
set total = total + increments.inc
from increments
where totals.id = increments.id
The closest one can come with H2 is:
update totals
set total = total + (select inc from increments where totals.id =
increments.id)
where exists (select inc from increments where totals.id =
increments.id)
which is ugly and I think will do each join twice. It would be nice
if H2 had better syntax for this.
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