1
vote
0answers
29 views

Monoblock, Multiblock queries?

What exactly mean the terms monoblock / multiblock queries in data warehouses when talking about materialized views? Does a monoblock query just use one data source (a normal table) while a multiblock ...
1
vote
2answers
1k views

Materialized View - Oracle

I have materialized view for which i want to alter its refresh time: REFRESH FORCE START WITH SYSDATE NEXT SYSDATE +1 DISABLE QUERY REWRITE I want to know few things in this. What does NEXT ...
2
votes
2answers
1k views

WITH using INDEX hint in Oracle

I have a fairly complicated query. I have written two different query to accomplish my goal. First one is using WITH, other one is using global temporary tables. First One: WITH A ( KNO .. ) , ...
5
votes
2answers
790 views

Using totals on aggregates to improve performance

I have two tables: details and totals of these details. Details (Slow solution): select OrderId = r.OrderId , TotalQty = SUM(r.Quantity) , ...