Top Sql Queries In Oracle. TOP 10 SQL Query SqlArea Top-N queries provide a method for limiting the number of rows returned from ordered sets of data. Top-n SQL method - Use a subselect with ROWNUM.
Top-N Queries and Pagination Top-N and pagination queries frequently pop up in applications. Coding a few simple queries in place of a single complex query is a better approach because the individual SQL statements are easier to optimize and maintain. The SQL statements that appear in the Top SQL section are categorized into various wait classes based on their corresponding color as described in the legend on the Top Activity graph.
Top-N Queries and Pagination Top-N and pagination queries frequently pop up in applications.
Spool sqlarealst set pagesize 66 linesize 180 trimspool on set echo off. TOP 10 SQL Query SqlArea Top-N queries provide a method for limiting the number of rows returned from ordered sets of data. Top-n method 1 - Use the SQL dense_rank and SQL ranking functions. On the Top Activity page shown in Figure 9-1 SQL statements are displayed for CPU usage shown in green concurrency shown in dark red and system IO shown in light.