今天給大家演示在linux下如果用C 操作mysql
1:安裝MySQL 掛載光碟：
mkdir /cdrom
mount /dev/hdc /cdrom
cd /cdrom/Server
rpm -ivh perl-DBI-1.52-2.el5.i386.rpm
rpm -ivh mysql-5.0.45-7.el5.i386.rpm mysql-bench-5.0.45-7.el5.i386.rpm mysql-devel-5.0.45-7.el5.i386.rpm
rpm -ivh perl-DBD-MySQL-3.0007-2.el5.i386.rpm
rpm -ivh mysql-server-5.0.45-7.el5.i386.rpm mysql-test-5.0.45-7.el5.i386.rpm查看mysql服務狀態：
service mysqld status啟動服務：
service mysqld start連接資料庫：
mysql 2：安裝gcc工具包 rpm -ivh gcc* --force --nodeps 強制安裝 3：進入mysql create table t1 (id int,name varchar(30)); t1表插入數據：
1.cpp
#include <iostream>
#include <mysql/mysql.h>
#include <string>
using namespace std;
main()
{
MYSQL mysql;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", "test", 3306, NULL, 0);
string sql = "insert into t1 (id, name) values (1, 'java1');";
mysql_query(&mysql, sql.c_str());
mysql_close(&mysql);
}
g -o 1.out 1.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql 更新mysql數據；
1.cpp
#include <iostream>
#include <mysql/mysql.h>
#include <string>
using namespace std;
main()
{
MYSQL mysql;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", "test", 3306, NULL, 0);
string sql = "insert into t1 (id,name) values (2, 'java2'),(3, 'java3');";
mysql_query(&mysql, sql.c_str());
sql = "update t1 set name = 'java33' where id = 3;";
mysql_query(&mysql, sql.c_str());
mysql_close（&mysql);
}
g -o 1.out 1.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql
./1.out mysql 存儲過程：
mysql>delimiter //
>create procedure p01()
>begin
>insert into t1 (id,name) values (66, 'java66');
>end;
>//應用存儲過程： mysql>delimiter //
>create procedure p01()
>begin
>insert into t1 (id,name) values (66, 'java66');
>end;
>// 觸發器：
新建t2表：
mysql>delimiter //
>create trigger tr1 after insert on t1 for each row
>begin
>insert into t2 (id,name) values (new.id,new.name);
>end;
>//
>delete from t1 where id = 66;
>//
>delimeter ; vi 3.cpp
#include <iostream>
#include <string>
#include <mysql/mysql.h>
using namespace std;
main()
{
MYSQL mysql;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", 3306, NULL, 0);
string sql = "call p01();";
mysql_query(&mysql, sql.c_str());
mysql_close(&mysql);
}
g -o 3.out 3.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql
./3.out mysql>delimeter ;
>select * from t1;
>select * from t2;
>存在數據(66, 'java66') 查看錶中數據的總數： vi 4.cpp
#include <iostream>
#include <string>
#include <mysql/mysql.h>
using namespace std;
main()
{
MYSQL mysql;
MYSQL_RES *result = NULL;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", "test", 3306, NULL, 0);
string sql = "select id,name from t1;";
mysql_query(&mysql, sql.c_str());
result = mysql_store_result(&mysql);
int rowcount = mysql_num_rows(result);
cout << rowcount << endl;
mysql_close(&mysql);
}
g -o 4.out 4.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql
./4.out 查處欄位的總數: vi 5.cpp
#include <iostream>
#include <string>
#include <mysql/mysql.h>
using namespace std;
main()
{
MYSQL mysql;
MYSQL_RES *result = NULL;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", 3306, NULL, 0);
string str = "select id,name from t1;";
mysql_query(&mysql, sql.c_str());
result = mysql_store_result(&mysql);
int rowcount = mysql_num_rows(result);
cout << rowcount << endl;
int fieldcount = mysql_num_fields(result);
cout << fieldcount << endl;
mysql_close(&mysql);
}
g -o 5.out 5.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql
./5.out 列出具體欄位名： vi 6.cpp
#include <iostream>
#include <string>
#include <mysql/mysql.h>
using namespace std;
main()
{
MYSQL mysql;
MYSQL_RES *result = NULL;
MYSQL_FIELD *field = NULL;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", "test", 3306, NULL, 0);
string str = "select id,name from t1;";
mysql_query(&mysql, sql.c_str());
result = mysql_store_result(&mysql);
int rowcount = mysql_num_rows(result);
cout << rowcount << endl;
int fieldcount = mysql_num_fields(result);
cout << fieldcount << endl;
for(int i = 0; i < fieldcount; i )
{
field = mysql_fetch_field_direct(result,i);
cout << field->name << "tt";
}
cout << endl;
mysql_close(&mysql);
}
g -o 6.out 6.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql
./6.out 顯示錶中所有數據： vi 7.cpp
#include <iostream>
#include <string>
#include <mysql/mysql.h>
using namespace std;
main()
{
MYSQL mysql;
MYSQL_RES *result = NULL;
MYSQL_FIELD *field = NULL;
mysql_init(&mysql);
mysql_real_connect(&mysql, "localhost", "root", "root", 3306, NULL, 0);
string str = "select id,name from t1;";
mysql_query(&mysql, sql.c_str());
result = mysql_store_result(&mysql);
int rowcount = mysql_num_rows(result);
cout << rowcount << endl;
int fieldcount = mysql_num_fields(result);
cout << fieldcount << endl;
for(int i = 0; i < fieldcount; i )
{
field = mysql_fetch_field_direct(result,i);
cout << field->name << "tt";
}
cout << endl;
MYSQL_ROW row = NULL;
row = mysql_fetch_row(result);
while(NULL != row)
{
for(int i=1; i<fieldcount; i )
{
cout << row[i] << "tt";
}
cout << endl;
row = mysql_fetch_row(result);
}
mysql_close(&mysql);
}
g -o 7.out 7.cpp -lmysqlclient -I/usr/include/mysql/ -L/usr/lib/mysql
./out本文出自 「Art_Hero」 博客,請務必保留此出處http://curran.blog.51cto.com/2788306/533169
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