重点-数据库索引 · 数据库

https://www.bilibili.com/video/BV1HX4y1N7v6 ![](https://img.kancloud.cn/8b/25/8b25cafb78de32e9987e295c11f96596_1014x250.png) ![](https://img.kancloud.cn/3e/d0/3ed02b40122b3bfde703249c1d684d0b_962x293.png) ![](https://img.kancloud.cn/00/56/00561520ddf1f653266858e7779a234a_566x376.png) ![](https://img.kancloud.cn/d1/f5/d1f5e1eca3eaff8f2442097518ff0549_999x255.png) ![](https://img.kancloud.cn/e1/0c/e10c9fab5b59a574d8722751abb97e4d_993x150.png) ![](https://img.kancloud.cn/a7/d8/a7d866c09362a5ba622dc31b39a34109_980x546.png) ![](https://img.kancloud.cn/94/e6/94e65186e8eddfb13030b9df5565e4b4_1102x444.png) ![](https://img.kancloud.cn/41/eb/41eb4b3a673bb167dc3415d1df52525b_977x492.png) **这种结构就是B+tree，一般3层就够了。** ![](https://img.kancloud.cn/9c/c9/9cc9b1b93a1dba8da53bf64b2e6ecb67_951x282.png)