作为一名数据库管理员（DBA），性能优化是核心职责之一。而深入理解和掌握 执行计划 ，则是提升数据库性能的关键。近期，IT168企业级频道发布了一篇关于数据库执行计划的深度文章，引发了广泛关注。文章指出，相当比例的DBA未能充分利用执行计划进行优化，这直接影响了数据库的性能调优效果。本文将基于该文章的内容，深入探讨 Oracle 、 MySQL 和 PostgreSQL ...

作为一名DBA，你是否曾在面对性能瓶颈时感到无从下手？是否在处理慢查询时，面对复杂的执行计划感到困惑？答案其实都藏在执行计划中。令人惊讶的是，许多DBA并未能正确解读执行计划，这直接影响了数据库性能调优的效果。今天，我们将深入探讨Oracle、MySQL和PostgreSQL三大数据库执行计划的区别，助你成为更出色的DBA。

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