Understand your job well and learn to perform.
先要很好的了解你的工作，然后学着去表现自己。
Learn to use access plan information to understand how to optimize your SQL statements.
了解如何使用访问计划信息优化sql语句。
The better that you understand the most fundamental level of your field, the easier it will be to learn the next level.
对你的领域里的基础知识理解的越好，你就越容易提升到更高的层次。
The better that you understand the most fundamental level of your field, the easier it will be to learn the next level.
对你的领域里的基础知识理解的越好，你就越容易提升到更高的层次。
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