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PHP与MYSQL数据库查询语句:$DB%>prEpArE("sElECt usEr...

$query = "select * from uchome_record_score where username='$username'";sql语句中等于是=,==是php里的

(1) select username from user where id='3';(2) $username=your_name;$userpass=your_pass;$dbhost=localhost;$dbdatabase=your_database;//生成一个连接 $db_connect=mysql_connect($dbhost,$username,$userpass) or die("Unable to

php中,.是连接符,改成这样$proname = "SELECT areaname FROM oepre_user_params JOIN oepre_hometown ON oepre_user_params".".`provinceid` = oepre_hometown.`areaid` WHERE userid=123;

<?php$mysql = mysql_connect("localhost","mysql_user","mysql_pwd"); if (!$mysql) { die('Could not connect: ' . mysql_error()); }$name = $_GET['name'];$result = $mysql->db_query(select zimu from ceshi where hanzi like "%$name%"); echo $result; mysql_close($mysql);?>

SELECT * FROM count WHERE count LIKE '2,%' OR count LIKE '%,2' OR count LIKE '%,2,%'

$info=mysql_query("select * from xxx where d_date = unix_timestamp(now())"); 试一下.

<?php//1,连接数据库$con=mysql_connect('127.0.0.1','root','123456');//2,判断是否有错误,如果有错误输出提示,并停止程序运行 if(mysql_errno()){ echo '链接数据库失败,错误是'.mysql_errno(); exit; }//3,选择库 mysql_select_db('32demo');

在手册里面有关于提示处理的MYSQL函数 参考手册:(PHP 3, PHP 4, PHP 5)mysql_error -- 返回上一个 MySQL 操作产生的文本错误信息 说明string mysql_error ( [resource link_identifier] )返回上一个 MySQL 函数的错误文本,如果没有出错则

这个不用实例化 你只要实例化了数据库类就行了 我读了你这个类,$sql在里面应该是SQL语句的意思,$sql只是类里面的形式参数. 实际你只要传递一个值进去就行了. 比如: <?php $db=new mysql('localhost','root','','test','') //实例化mysql

楼上的不是很好,查了5次数据库foreach($uid as $rs){$uid_all .= isset($uid_all)?','.$rs:$rs; }$sql="select uid,username from table where uid in (uid_all)";

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