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RSS订阅原创 sql3.50——3.56
3.50 select student.sno ,sname,ssex,sage,sdept,cno,grade from student,sc where student.sno=sc.sno; 3.51 select sc.sno,sname from sc,student where sc.cno='2' and
2016-11-16 18:18:33
194
原创 用c语言写单链表
#include #include //the node struct NodeN{ int data; struct NodeN *next; }; typedef struct NodeN *Node; void init(Node *Lp);//为甚么不一样。*lp与l void insert(Node L,int dat
2016-11-11 09:46:41
194
原创 矩阵相乘
#include #define M (10) #define N (10) int pro(a[i][j],b[m][n]); int main() { int a[M][N]; int b[M][N]; int c[M][N]; int i,j,m,n; printf("input A\n"); for(i=0;i { for(j=0
2016-11-09 20:50:35
226
1
原创 sql3.35——3.49
3.35 select * from course where cname like'DB\_%i__'ESCAPE 3.36 select sno,cno from sc where grade is NUll; 3.37 select sno,cno from sc where
2016-11-09 18:13:27
190
原创 sql_create&insert_data
3.5 create table student(sno char (9) primary key,sname char(20)unique,ssex char(2),sage smallint,sdept char(20)); 3.6 create table course(cno char(4)primary key,cname char(40)not null,cpno char(4)
2016-11-09 13:15:48
234
原创 sql
例题 ALTER TABLE student ADD s_entrance DATA; ALTER TABLE student ALTER column sage INT; ALTER TABLE course ADD UNIQUE(cname); select sno，sname FROM student; 3.20 select sname,'year of bir
2016-11-02 18:23:19
287
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