SQL优化

<h2><a id="join_0"></a>因为字符不一致导致join查询不走索引</h2> <p><img src="https://v-kun-file.oss-cn-beijing.aliyuncs.com/blog/2022-10-25/ddbfae4e9c724d149fa2a96a7760e3c2/image.png" alt="image" /></p>