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explain plan looks ok but the statement is still taking a bit of time
Answers
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It might be faster - but you don't know whether the time is spent on identifying the data to be updated or on performing the subqueries that calculate new values; and since it appears that there are two (or more) columns being updated by two significantly differing subqueries that involve analytic functions it might not be possible to create an efficient USING subquery for a merge; so it might be better to wait to see what the statement looks like before guessing how best to change it.
Regards
Jonathan Lewis
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Can you move your monitor closer to the window? I'm having difficulty seeing your update statement.
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Hi the version is 12c. After further digging, I realized the reason why the update statement is slow is due to the number of triggers created on the required updated table.
