Good clarification. Any downside to using an auto increment number? ``````````` fiKeyID INTEGER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY ```````````
On Fri, Dec 13, 2019 at 12:15 PM Mark Rotteveel m...@lawinegevaar.nl [firebird-support] <firebird-support@yahoogroups.com> wrote: > > > On 13/12/2019 19:07, Clyde Eisenbeis cte...@gmail.com [firebird-support] > wrote: > > Is <timestamp> a field I create, or is it part of all records? > > It is a field you create. Which is why I wrote "Where <table> is the > table in question, and <timestamp> is a suitable column (eg a timestamp) > to determine what the newest record is." > > You might be able to use the pseudo-column RDB$RECORD_VERSION, but that > is not necessarily in the right order of recency, because the value is > the transaction-number that wrote the last version of the record. This > means that updates to a record will also make it 'recent' and a record > written by a long-running transaction might not show up as 'recent' (or > at least as older than it may actually be). > > Mark > -- > Mark Rotteveel > >
