mysql乐观锁、悲观锁、共享锁、排它锁、行锁、表锁概念的理解

https://blog.csdn.net/L_BestCoder/article/details/79298417?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1

https://www.cnblogs.com/boblogsbo/p/5602122.html

https://blog.csdn.net/puhaiyang/article/details/72284702?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4