Suddenly, they feel emboldened like they can solve every SQL problem in the system. Now, if your system has been actively tuned by an Oracle Admin in the past, my experience is that about 25% of the ...

This broad-brush approach can save thousands of hours of tedious SQL tuning because you can hundreds of queries at once. Remember, you MUST do this first, else later changes to the optimizer ...

このリポジトリは SQL を一通り学んだ初級者向けに、ごく簡単な SQL チューニングの練習問題を提供します。練習問題となる SQL 文だけではなくテーブルやデータを作成するスクリプトも含む ...

Identifying and tuning the most resource-intensive SQL statements is one of the highest-leverage activities a DBA can perform. A single poorly-written query can consume 90% of the CPU on a busy system ...