• 2022-11-02HAL库下使用printf
    1.包含头文件#include"stdio.h"2.重定义串口intfputc(intch,FILE*f){while((USART1->SR&0X40)==0);//循环发送,直到发送完毕USART1->DR=(uint8_t)
  • 2022-10-26查看mysql库下所有表的大小
    selecttable_nameas'表名',(data_length/1024/1024)as'数据容量(MB)',(index_length/1024/1024)as'索引容量(MB)',((data_length+index_length)/1024/1024)as
  • 2022-09-01查询某个库下所有表及其占用空间大小
    @name:表名、reserved:存储、data:数据、index_size:索引、unused:空闲、createtable#Data12138(namevarchar(100),rowvarchar(100),reservedvarchar(100),datavarchar(1