use electric go --建立供电局1#仓库所存放物资的视图. create view s1_stock as select * from stock where warehouse='供电局1#仓库'; select * from s1_stock --建立供电局1#仓库所存放物资的视图,并要求进行修改和插入操作时仍需保证该视图只有供电局1#仓库所存放的物资. create view s2_stock as select * from stock where warehouse='供
实现了 增删改查 创建了一个结构体 保存 num name cout price 代码 #include<stdio.h>#include<string.h>#include<fcntl.h>#include<sys/mman.h> typedef struct{ int num; char name[32]; int count; int price;}GOOD; int main(int argc,char *argv[]){ FILE *fp; GOO