Oracle hints are optimizer directives that are used in SQL de-bugging to change the default execution plan for SQL. Once the SQL has been optimized by adding the hint, the Oracle professional will adjust schema statistics (using dbms_stats) to replicate the execution plan without the hint. Oracle parallel hint tips Oracle Database Tips by Donald BurlesonMarch 31, Question: I want to understand how the parallel hint works inside a SQL statement and I also want to know the optimal degree for the parallel hint. Oracle checks the statement for a parallel hint. If such a hint is found, the hint overrides the degree of parallelism obtained as a result of the previous step. You can use the PARALLEL and PARALLEL_INDEX hints to specify the degree of parallelism for a SELECT statement.

Noparallel hint in oracle 10g

This doesn't answer the question. It's just a generic statement about Oracle's parallel capabilities, not a specific answer about where the parallel hint can be used. – Colin 't Hart Oct 28 '15 at Oracle checks the statement for a parallel hint. If such a hint is found, the hint overrides the degree of parallelism obtained as a result of the previous step. You can use the PARALLEL and PARALLEL_INDEX hints to specify the degree of parallelism for a SELECT statement. Hints for Enabling Optimizer Features. The OPTIMIZER_FEATURES_ENABLE hint acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle Database release number. This hint is a useful way to check for plan regressions after database upgrades. Specify the release number as an argument to the hint. Oracle parallel hint tips Oracle Database Tips by Donald BurlesonMarch 31, Question: I want to understand how the parallel hint works inside a SQL statement and I also want to know the optimal degree for the parallel hint. Oracle ignores hints in all SQL statements in those environments that use PL/SQL version 1, such as Forms version 3 triggers, Oracle Forms , and Oracle Reports These hints can be passed to the server, but the server ignores them.Oracle Database Tips by Donald BurlesonMarch 31, Question: I want to understand how the parallel hint works inside a SQL statement and I also want to . The APPEND hint always follows the INSERT keyword, and the PARALLEL hint . The user wants the first 10 employees of department #20 to be displayed as. Oracle will make use of Parallel Loading when “Parallel” hints is used Reference: Oracle® Database SQL Reference - 10g Release 2 (). For example, consider the following PL/SQL block that uses a cursor to retrieve the first 10 hits of a query and uses the FIRST_ROWS(n) hint to optimize the. Home / Database / Oracle Database Online Documentation, 10g Release 2 ( ) .. If you specify either the ALL_ROWS or the FIRST_ROWS (n) hint in a SQL.

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