Questions tagged [parallel-query]

For a while I've trying to get the time to write this question and explain the issue as best as I can, so forgive me in advance for the long text. My environment: Oracle Database 12.2 running on Red Hat 7 ( R.A.C 2 nodes ) - 16CPU and 64GB RAM per…

using Postgresql 15.2, I tried any kind of query that join a CTE with a table: with t as (select t.day from calendar where idtime between 20230101 and 20230224) select idcell, sum (tmean) from weather w join t on w.day = t.day group by…

I have one insert into select query, like : INSERT /*+ append */ INTO select col1,col2........... from table1,table2(multiple table join) When I compare plan between prod and UAT, I see UAT is running in 4 DOP but prod is not running in…