C语言MySQL 基础操作（添加、查询和删除）

MySQL 之数据添加

/*练习mysql数据库的查询*/
#include 
#include 
#include "/usr/local/mysql/include/mysql.h"


int main()
{
	MYSQL mysql;
	MYSQL_RES *res;
	MYSQL_ROW row;
	char *query;
	int flag, t;
	mysql_init(&mysql);
	if(!mysql_real_connect(&mysql, "localhost", "root", "123456", "test", 0, NULL, 0)) {
		printf("Failed to connect to Mysql!\n");
		return 0;
	}else {
		printf("Connected to Mysql successfully!\n");
	}
	query = "select * from student";
	/*查询，成功则返回0*/
	flag = mysql_real_query(&mysql, query, (unsigned int)strlen(query));
	if(flag) {
		printf("Query failed!\n");
		return 0;
	}else {
		printf("[%s] made...\n", query);
	}


	/*mysql_store_result讲全部的查询结果读取到客户端*/
	res = mysql_store_result(&mysql);
	/*mysql_fetch_row检索结果集的下一行*/
	while(row = mysql_fetch_row(res)) {
		/*mysql_num_fields返回结果集中的字段数目*/
		for(t=0; t

编译：gcc -o mysqlselect -I /usr/local/include/mysql/ -L /usr/local/mysql/lib -lmysqlclient mysqlselect.c

执行：./mysqlselect

结果展示：

[root@iZ94qvmp90hZ c]# gcc -o mysqlselect -I /usr/local/include/mysql/ -L /usr/local/mysql/lib -lmysqlclient mysqlselect.c
[root@iZ94qvmp90hZ c]# ls -a
.   a.out       hello.c      mysqlselect.c  testmysql.c
..  datatype.c  mysqlselect  testmysql      testmysql.o
[root@iZ94qvmp90hZ c]# ./mysqlselect
Connected to Mysql successfully!
[select * from student] made...
1	1	
2	2	
3	3	

MySQL 之插入

/*练习mysql数据库的数据添加*/  
#include   
#include   
#include "/usr/local/mysql/include/mysql.h"  
  
  
int main()  
{  
    MYSQL mysql;  
    MYSQL_RES *res;  
    MYSQL_ROW row;  
    char *query;  
    int flag, t;  
    mysql_init(&mysql);  
    if(!mysql_real_connect(&mysql, "localhost", "root", "123456", "test", 0, NULL, 0)) {  
        printf("Failed to connect to Mysql!\n");  
        return 0;  
    }else {  
        printf("Connected to Mysql successfully!\n");  
    }  
    query = "insert into student(id,name) values(4,'5')";  
    /*插入，成功则返回0*/  
    flag = mysql_real_query(&mysql, query, (unsigned int)strlen(query));  
    if(flag) {  
        printf("Insert data failure!\n");  
        return 0;  
    }else {  
        printf("Insert data success!\n");  
    }  
  
  
    mysql_close(&mysql);  
    return 0;  
}  

编译：gcc -o mysqlinsert -I /usr/local/include/mysql/ -L /usr/local/mysql/lib -lmysqlclient mysqlinsert.c

执行：./mysqlinsert

结果展示：

[root@iZ94qvmp90hZ c]# gcc -o mysqlinsert -I /usr/local/include/mysql/ -L /usr/local/mysql/lib -lmysqlclient mysqlinsert.c
[root@iZ94qvmp90hZ c]# ls -a
.   a.out       hello.c      mysqlinsert.c  mysqlselect.c  testmysql.c
..  datatype.c  mysqlinsert  mysqlselect    testmysql      testmysql.o
[root@iZ94qvmp90hZ c]# ./mysqlinsert
Connected to Mysql successfully!
Insert data success!

MySQL 之删除

/*练习mysql数据库的删除*/  
#include   
#include   
#include "/usr/local/mysql/include/mysql.h"  
  
int main()  
{  
    MYSQL mysql;  
    MYSQL_RES *res;  
    MYSQL_ROW row;  
    char *query;  
    int flag, t;  
    mysql_init(&mysql);  
    if(!mysql_real_connect(&mysql, "localhost", "root", "123456", "test", 0, NULL, 0)) {  
        printf("Failed to connect to Mysql!\n");  
        return 0;  
    }else {  
        printf("Connected to Mysql successfully!\n");  
    }  
    query = "delete from student  where log_id=1";  
    /*删除，成功则返回0*/  
    flag = mysql_real_query(&mysql, query, (unsigned int)strlen(query));  
    if(flag) {  
        printf("Delete data failure!\n");  
        return 0;  
    }else {  
        printf("Delete data success!\n");  
    }  
  
    mysql_close(&mysql);  
    return 0;  
}  

编译：gcc -o mysqldelete -I /usr/local/include/mysql/ -L /usr/local/mysql/lib -lmysqlclient mysqldelete.c

执行：./mysqldelete

执行结果：

[root@iZ94qvmp90hZ c]# gcc -o mysqldelete -I /usr/local/include/mysql/ -L /usr/local/mysql/lib -lmysqlclient mysqldelete.c
[root@iZ94qvmp90hZ c]# ./mysqldelete
Connected to Mysql successfully!
Delete data success!