PHP常用数据库代码汇总

连接MYSQL

    //MYSQL数据库配置
    define(DB_HOST, '127.0.0.1');  
    define(DB_USER, 'user');  
    define(DB_PASS, 'pass');  
    define(DB_DATABASENAME, 'database');  
 
    //连接mysql数据库
    $conn = mysql_connect(DB_HOST, DB_USER, DB_PASS) or die("connect failed" . mysql_error());  
    mysql_select_db(DB_DATABASENAME, $conn); 

连接MSSQL

     $conn=mssql_connect('IP:PORT','userid','pass'); 
       mssql_select_db('database',$conn); 
      $sql="select * from dde_top"; 
     $Result=mssql_query($sql); 

SELECT语句

    //SELECT语句
    $sql=sprintf("SELECT username FROM  v9_member where username='%s' ",$userid);
    $result=mysql_query($sql);
    
    //用途1：获取记录数量
    $num = mysql_num_rows($result);     
     if($num==0){
        echo "no_user";  //返回1： 没有此用户
        return;
    }
    //用途2：获取一条数据
     $row = mysql_fetch_array($result) 
     $row = mysql_fetch_array($result) 
     $row = mysql_fetch_array($result) 
    
     
    //用途3：遍历记录集，并转化成数组
      
    while( $row = mysql_fetch_array($result) ){
         $game = $row['game'];             //游戏名
        $giftname = $row['giftname'];      //礼包名字
     }

UPDATE语句

     //更新此CDKEY的used,userid,getdate
     $sql=sprintf("UPDATE qyg_gifts SET  userid='%s',getdate=%d WHERE cdkey='%s' ",$userid,time(),$cdkey);
     $result=mysql_query($sql);    

DELETE语句

     $sql="delete from qyg_gifts where game='$select_game'";
     mysql_query($sql); 

INSERT语句

//A：插入一条数据
$sql=sprintf("INSERT INTO `t_gifts` (`F_UserID`, `F_Gift`, `F_Count`) VALUES ('%s','%s',%d)",$userid,$gift,$count);     
         $result=mysql_query($sql);

 //B：生成一次性插入多条的SQL语句

         $sqls="INSERT INTO `t_gifts` (`F_UserID`, `F_Gift`, `F_Count`, `F_Desc`, `F_Used`, `F_BlockNo`, `F_GetDate`) VALUES";
        $i=0;
         foreach($items_arr as $item){
 
              if($i==0){
                $sqls=$sqls.sprintf("('%s','%s',%d,'%s',0,-1,'%s')",$userid,$item[0],$item[1],$gift_name,date('Y-m-d H:i:s',time()) );
            }else{
                $sqls=$sqls.sprintf(",('%s','%s',%d,'%s',0,-1,'%s')",$userid,$item[0],$item[1],$gift_name,date('Y-m-d H:i:s',time()) );
            }    
            $i++;        
        }
        $sqls=$sqls.";";     
         $result=mysql_query($sql);