Stefanovitch1
Programmer
I have a relatively simple query which references 4 tables. Some of the tables are quite large. Is there a rule as to which tables are accessed first so I could perhaps filter on them first.
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How does Oracle process SQL
- Thread starter Stefanovitch1
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If you are using outer joins, oracle will follow the order which they appear in your query. With inner joins the optimizer picks what it thinks is the best order. If you want to see what the optimizer chose, use top-session. Sometimes you can force the order by using sub-queries.
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