1.MySql常用函数大全讲解 https://blog.csdn.net/Evankaka/article/details/47911749?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
2.MySQL函数大全及用法 https://blog.csdn.net/qq_42239765/article/details/83898664
3.The bean ‘userRoleRepository‘, defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.
4.stream交集、并集、去重、对象根据属性去重 https://www.jianshu.com/p/2397b35e383b
5.Java中有哪些无锁技术来解决并发问题？如何使用？ https://www.jianshu.com/p/79a13a22e275
6.关键字transient是干啥的 https://blog.csdn.net/u010188178/article/details/83581506
7.使用5种方式遍历list集合 https://blog.csdn.net/GengMingHui_5/article/details/88880224?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
8.王强博客
java基础之super关键字 https://www.cnblogs.com/wangqiang9/p/9523157.html
9.尚硅谷之MySQL基础 http://www.atguigu.com/jsfx/4566.html
10.https://www.jianshu.com/p/5dd02cf8e7dc
11.尚硅谷MySQL核心技术基础知识笔记 https://www.jianshu.com/p/91856df6b6f9
12.DROP TABLE、TRUNCATE TABLE和DELETE的区别 https://www.cnblogs.com/lanbosm/articles/8714688.html
13.MySQL——约束(constraint)详解 https://blog.csdn.net/w_linux/article/details/79655073?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
14.【学习笔记】--2018尚硅谷韩顺平Linux https://blog.csdn.net/qq_33654685/article/details/88055146
15.C语言教程 http://c.biancheng.net/linux_tutorial/
16.linux常用命令（50个） https://www.cnblogs.com/xuxinstyle/p/9609551.html
原文：https://www.cnblogs.com/risirirui/p/12437204.html