12.6.07 mysql 5.0学习手记(持续更新)
12.06.07
参考书籍：
《mysql 5权威指南 》
按照书中所示，apache、php 可以安装成功，但联接不能成功，故，使用appserv集成包进行安装，成功，mysql单独安装为5.0版本
perl不可使用命令>ppm (每次使用出现cgi窗口，可能由于active perl版本问题造成的)
在进行perl安装测试时，书中出现严重错误，p24 命令修正：
#usr/bin/perl -w
print "hello world\n";
print
"please hit Return to end the program!";
$wait_for_return=<STDIN>;
print "hello world\n";
"please hit Return to end the program!";
$wait_for_return=<STDIN>;
按以上修改可以通过测试
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12.08.07
1> 使用mysql数据库时，有时会反馈 "ERRO 1064<42000>"错误，这个错误提示的出现通常是由于输入的命令格式或单词有误，所以认真核对一下命令，通常都可以解决
exp. > create 错误拼写为 .>creat
2>在创建mysql学习库时，可以用.>create database test_XXX; 进行创建
因为： 根据mysql访问控制机制默认设置，任何用户都有权在本地计算机上使用以单词“test”开始的名字来创建新的数据库，<此方法适用于无数据库管理员权限的操作者>
缺点：本地计算机 任何一位用户都可以编辑、修改和删除这种名字类型的数据库
3>代码，由于此书没有光盘，故代码只能从网络索取，为方便学习，按进度将代码附上
P48 vote.html->
<!doctype html public "-//w3c//dtd html 4.0//en">
<!-php/vote/vote.html->
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;charset=iso-8859-1"/>
<title>Mysql-poll</title>
</head>
<body>
<h2>Mysql-poll</h2>
<!-php/vote/vote.html->
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;charset=iso-8859-1"/>
<title>Mysql-poll</title>
</head>
<body>
<h2>Mysql-poll</h2>
<p><b>what is your favorite
programming language for developing mysql applications?</b></p>
programming language for developing mysql applications?</b></p>
<from method="POST" action="results.php">
<p> <input type="radio" name="vote" value="1"/>c/c++
<br /> <input type="radio" name="vote" value="2"/>java
<br /> <input type="radio" name="vote" value="3"/>perl
<br /> <input type="radio" name="vote" value="4"/>php
<br /> <input type="radio" name="vote" value="5"/>asp/vb/vba
<br /> <input type="radio" name="vote" value="6"/>another
</p>
<p><input type="submit" name="submitbutton" value="ok" /></p>
</from>
<p>Go directly to the <a href="results.php">result</a>.</p>
</body>
</html>
<p> <input type="radio" name="vote" value="1"/>c/c++
<br /> <input type="radio" name="vote" value="2"/>java
<br /> <input type="radio" name="vote" value="3"/>perl
<br /> <input type="radio" name="vote" value="4"/>php
<br /> <input type="radio" name="vote" value="5"/>asp/vb/vba
<br /> <input type="radio" name="vote" value="6"/>another
</p>
<p><input type="submit" name="submitbutton" value="ok" /></p>
</from>
<p>Go directly to the <a href="results.php">result</a>.</p>
</body>
</html>
P51 results.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<!-php/vote/results.php->
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;charset=iso-8859-1" />
<title>Survey Result</title>
</head>
<body>
<h2>Survey Result</h2>
<?php
<!-php/vote/results.php->
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;charset=iso-8859-1" />
<title>Survey Result</title>
</head>
<body>
<h2>Survey Result</h2>
<?php
$mysqlhost="localhost";
$mysqluser="root";
$mysqlpasswd="";
$mysqldbname="test_vote";
//create connection to the database
$link=
@mysql_connect(mysqlhost,$mysqluser,$mysqlpasswd);
if($link==FALSE)
{
echo"<p><b>Unfortunately,a connection to the
database cannot be made.Therefore,
the results cannot be displayed at this time
please try again later.</b></p>
</body></html>\n";
exit();
}
mysql_select_db($mysqldbname);
//if questionnaire data are available:
//evaluate+store
function array_item($ar,$key)
{
if(array_key_exists($key,$ar))return($ar[$key]);
return('');
}
$submitbutton=array_item($_POST,'submitbutton');
$vote=array_item($_POST,'vote');
if($submitbutton=="OK")
{
if($vote>=1 && $vote<=6)
{
mysql_query(
"INSERT INTO votelanguage (choice)VALUES($vote)");
}
else{
echo"<p>Not a valid selection.Please vote again.Back to
<a href=\"vote.html\">questionnaire</a>.</p>
</body></html>\n";
exit();
}
}
//DISPLAY results
echo "<p><b>What is your favorite programming language
for developing mysql applications?</b></p>\n";
//number of vates cast
$result =
mysql_query("SELECT COUNT(choice) FROM votelanguage");
$choice_count=mysql_result($result,0,0);
$mysqluser="root";
$mysqlpasswd="";
$mysqldbname="test_vote";
//create connection to the database
$link=
@mysql_connect(mysqlhost,$mysqluser,$mysqlpasswd);
if($link==FALSE)
{
echo"<p><b>Unfortunately,a connection to the
database cannot be made.Therefore,
the results cannot be displayed at this time
please try again later.</b></p>
</body></html>\n";
exit();
}
mysql_select_db($mysqldbname);
//if questionnaire data are available:
//evaluate+store
function array_item($ar,$key)
{
if(array_key_exists($key,$ar))return($ar[$key]);
return('');
}
$submitbutton=array_item($_POST,'submitbutton');
$vote=array_item($_POST,'vote');
if($submitbutton=="OK")
{
if($vote>=1 && $vote<=6)
{
mysql_query(
"INSERT INTO votelanguage (choice)VALUES($vote)");
}
else{
echo"<p>Not a valid selection.Please vote again.Back to
<a href=\"vote.html\">questionnaire</a>.</p>
</body></html>\n";
exit();
}
}
//DISPLAY results
echo "<p><b>What is your favorite programming language
for developing mysql applications?</b></p>\n";
//number of vates cast
$result =
mysql_query("SELECT COUNT(choice) FROM votelanguage");
$choice_count=mysql_result($result,0,0);
//percentages for the individual voting categories
if($choice_count==0)
{
echo"<p>$choice_count individuals have thus far taken part
in this survey:</p>\n";
$choicetext=array("","c/c++","java","perl","php","vb/vba","andere");
print("<p><table>\n");
for($i=1;$i<=6;$i++)
{
$result=mysql_query(
"SELECT COUNT(choice) FROM votelanguage".
"WHERE choice=$i");
$choice[$i]=mysql_result($result,0,0);
$percent=round($choice[$i]/$choice_count*10000)/100;
print("<tr><td>$choicetext[$i]:</td>");
print("<td>$percent % </td></tr>\n");
}
print("</table></p>\n");
}
?>
</body>
</html>
if($choice_count==0)
{
echo"<p>$choice_count individuals have thus far taken part
in this survey:</p>\n";
$choicetext=array("","c/c++","java","perl","php","vb/vba","andere");
print("<p><table>\n");
for($i=1;$i<=6;$i++)
{
$result=mysql_query(
"SELECT COUNT(choice) FROM votelanguage".
"WHERE choice=$i");
$choice[$i]=mysql_result($result,0,0);
$percent=round($choice[$i]/$choice_count*10000)/100;
print("<tr><td>$choicetext[$i]:</td>");
print("<td>$percent % </td></tr>\n");
}
print("</table></p>\n");
}
?>
</body>
</html>
本文出自 “Keith” 博客，谢绝转载！