I of course forgot to remove 'p005' from the list (luckily David
didn't!), so the query should have been:
UPDATE t AS tx SET b = 'z' WHERE (a,idate) = (SELECT ty.a,MAX(ty.idate)
FROM t AS ty WHERE ty.a = tx.a GROUP BY ty.a) AND a < 'p005';
which works well here (picking the minimal route), but your actual query
may or may not work better with the IN ('p001', 'p002',...) method of
checking.
Cheers!
Ryan
On 2019/05/15 4:22 PM, Jose Isaias Cabrera wrote:
Hi. I know this has been probably asked before by someone, but imagine the
following scenario//...
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