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dbaplus Community
dbaplus Community
Nov 29, 2017 · Databases

Why Fewer Permissions Slow Down Oracle SQL: A Deep Dive into EXISTS Subqueries

An Oracle SQL query with five EXISTS permission checks runs dramatically slower when only a few permissions are configured, and the author investigates the root cause using execution plans, SQL Monitor data, and step‑by‑step testing, ultimately revealing how execution counts and row returns drive the unexpected performance degradation.

EXISTSOraclePermission Checks
0 likes · 11 min read
Why Fewer Permissions Slow Down Oracle SQL: A Deep Dive into EXISTS Subqueries
dbaplus Community
dbaplus Community
Nov 25, 2015 · Databases

Unlock Oracle SQL Monitor: Free Tool for Powerful SQL Optimization

This guide explains how to access and use Oracle SQL Monitor—a free feature in Oracle Enterprise Edition—to capture SQL execution details, analyze performance bottlenecks, compare estimated and actual rows, and apply targeted optimizations using both the EM console and command‑line scripts.

Database PerformanceOracleSQL Monitor
0 likes · 9 min read
Unlock Oracle SQL Monitor: Free Tool for Powerful SQL Optimization