Little help in SQL

[SaKIB]

i am trying to edit 3 value from 7 values on a mysql table . But seems not working. Do i need to edit all values ?

using simple update command and using forms to put data.

SaKIB Reviewed by SaKIB on 15th Apr 2011. Little help in SQL i am trying to edit 3 value from 7 values on a mysql table . But seems not working. Do i need to edit all values ? using simple update command and using forms to put data. Rating: 5

[soft2050]

Nah! You need not update all values.

Could you post the code or something similar which is having same problem?

[fdls]

I think u should use something like this?

update tablename set column=value where uniquecolumn = value;

I hope you got what I wanted to say? Do it one by one and you will get it

[SaKIB]

I am trying but. it says working fine but now . ok here is the codes

<?php
$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="test"; // Database name 
$tbl_name="test_mysql"; // Table name 

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td>
<table width="400" border="1" cellspacing="0" cellpadding="3">
<tr>
<td colspan="4"><strong>List data from mysql </strong> </td>
</tr>

<tr>
<td align="center"><strong>Username</strong></td>
<td align="center"><strong>EMAIL</strong></td>
<td align="center"><strong>PASS</strong></td>
<td align="center"><strong>Update</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td><? echo $rows['username']; ?></td>
<td><? echo $rows['password']; ?></td>
<td><? echo $rows['email']; ?></td>

// link to update.php and send value of id 
<td align="center"><a href="update.php?id=<? echo $rows['id']; ?>">update</a></td>
</tr>
<?php
}
?>
</table>
</td>
</tr>
</table>
<?php
mysql_close();
?>

<?php
$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="test"; // Database name 
$tbl_name="test_mysql"; // Table name 

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// get value of id that sent from address bar
$id=$_GET['id'];


// Retrieve data from database 
$sql="SELECT * FROM $tbl_name WHERE id='$id'";
$result=mysql_query($sql);

$rows=mysql_fetch_array($result);
?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<form name="form1" method="post" action="update_ac.php">
<td>
<table width="100&#37;" border="0" cellspacing="1" cellpadding="0">
<tr>
<td>&nbsp;</td>
<td colspan="3"><strong>Update data in mysql</strong> </td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center">&nbsp;</td>
<td align="center">&nbsp;</td>
<td align="center">&nbsp;</td>
</tr>
<tr>
<td align="center">&nbsp;</td>
<td align="center"><strong>UserName</strong></td>
<td align="center"><strong>Password</strong></td>
<td align="center"><strong>Email</strong></td>
</tr>
<tr>
<td>&nbsp;</td>
<td align="center"><input name="username" type="text" id="username" value="<? echo $rows['username']; ?>"></td>
<td align="center"><input name="password" type="text" id="password" value="<? echo $rows['password']; ?>" size="15"></td>
<td><input name="email" type="text" id="email" value="<? echo $rows['email']; ?>" size="15"></td>
</tr>
<tr>
<td>&nbsp;</td>
<td><input name="id" type="hidden" id="id" value="<? echo $rows['id']; ?>"></td>
<td align="center"><input type="submit" name="Submit" value="Submit"></td>
<td>&nbsp;</td>
</tr>
</table>
</td>
</form>
</tr>
</table>

<?

// close connection 
mysql_close();

?>

<?php
$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="test"; // Database name 
$tbl_name="test_mysql"; // Table name 

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// update data in mysql database 
$sql="UPDATE $tbl_name SET username='$username', password='$password', email='$email' WHERE id='$id'";
$result=mysql_query($sql);

// if successfully updated. 
if($result){
echo "Successful";
echo "<BR>";
echo "<a href='list_records.php'>View result</a>";
}

else {
echo "ERROR";
}

?>

IT SAYS THAT WORK DONE> BUT DOESN"T CHANGE THE VALUE IN MYSQL

[t3od0r]

maybe you have an error there
replace
$result=mysql_query($sql);
with
$result=mysql_query($sql) or die(mysql_error());

[SaKIB]

@ t3od0r yes but it will show it works or not. i am trying get it working

[t3od0r]

SET username='$username', should be SET username='".mysql_real_escape_string($_POST['username'])."',

i don't see any $_POST in your update file

[SaKIB]

Just editing that line will work ?

IF yes tell me will check now

[Lock Down]

That is a real mish mash of code.

Looks like you are using the same db/table for all of it. You read an id and the user, pswd & email then pass the exact same data to be updated to itself.

Where is anything changing?

[jomasaco]

// get value of id that sent from address bar
$id=intval($_Post['id']);
$username = $_Post['username'];
$password = $_Post['password'];
$email = $_Post['email'];

For inserted/updated data use mysql_real_escape_string