Oracle DbLink查询性能优化

DbLink查询性能优化： DRIVING_SITE

SELECT /*+ DRIVING_SITE(departments) */
FROM employees, departments@rsite 
WHERE employees.department_id = departments.department_id;

 

Reference：

https://docs.oracle.com/cd/B13789_01/server.101/b10752/hintsref.htm#30401

https://www.cnblogs.com/sopost/archive/2010/10/11/2190076.html