About the mysql database: After installation, it cannot be connected, and an error is reported ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password）

About the mysql database: After installation, it cannot be connected, and an error is reported: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) Solution (valid for personal test) https:
//huaweicloud.csdn .net/63355026d3efff3090b53f5e.html?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7Eactivity-1-113923726 -blog-126490767.235%5Ev38%5Epc_relevant_default_base&depth_1-utm_source=distribute.pc_relevant_t0 .none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7Eactivity-1-113923726-blog-126490767.235%5Ev38%5Epc_relevant_default_base&utm_relevant_index=1