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The LEADING hint refers to the situation before all the swaps. For example, you can force Oracle to perform the bushy join ( T1 → T2 ) → ( T3 → T4 ) by writing the query schematically as followsAppExchange is the leading enterprise cloud marketplace with ready-to-install apps, solutions, and consultants that let you extend Salesforce into every industry and department, including sales, marketing, customer service, and more. The LEADING hint causes Oracle to use the specified table as the first table in the join order. If you specify two or more LEADING hints on different tables, then all of them are ignored. If you specify the ORDERED hint, then it overrides all LEADING hints. STAR QUERY PLAN이 사용가능하다면 이를 이용하기 위한 HINT 21. /*+DRIVING_SITE(table)*/ 쿼리의 실행이 다른 Site에서 일어나도록 유도(DBLINK 사용하여 Remote Server와 조인시) 22. /*+LEADING(table)*/ 조인 순서에서 지정된 테이블이 Driving 테이블이 되도록 함.
Dec 10, 2010 · Let me make the PARALLE hint more specific. SQL> explain plan for 2 merge /*+ parallel(t1) */ into t1 3 using (select c1, c2 from t2) t2 4 on (t1.c1 = t2.c1) 5 when ...
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hint. 내용. 사용 법. use_nl. nested loop join. 옵티마이저가 nested loop join을 사용하도록 한다. 먼저 특정 table의 row에 액세스하고 그 값에 해당하는 다른 table의 row를 찾는 작업을 해당범위까지 실행하는 조인. Using the Administration Tool, you can add hints to a repository, in both online and offline modes, to optimize the performance of queries. When you add a hint to the repository, you associate it with database objects. When the object associated with the hint is queried, the Oracle BI Server inserts the hint into the SQL statement.