Question~about Mysql - ALTER TABLE `xxx` ORDER BY `no`;

kakingho

Nov 30 2005, 02:46 PM

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`;);

Why i cant run the above code?!

But i can directly type and run this code in phpmyadmin's sql query

CODE

ALTER TABLE `xxx` ORDER BY `no`;

Modified title

no9t9

Nov 30 2005, 06:37 PM

Well, assuming that what you have written here is exactly what you've put on your web page... then i can see that you should have quotes around your query string. Also, I think you don't need the semi colon in the query string.

I always use a variable as the query string. something like $query="blah"; and then mysql_query($query); I think this is better.

truefusion

Nov 30 2005, 10:02 PM

My guess is cause you placed a semicolon inside the query, which makes php think you've ended the line. So, try this:

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`);

Spectre

Dec 1 2005, 04:48 AM

A semicolon can be placed within quotes and PHP will treat it simply as a string. As no9t9 noted, the query should be in quotes between the brackets of the mysql_query() function.

CODE

mysql_query('ALTER TABLE `xxx` ORDER BY `no`;');

Spectre

Dec 1 2005, 04:53 AM

Oh, it may also be worth noting that when sending queries to MySQL via PHP, they do not need to be terminated in themselves via a semicolon, as it is done automatically. So mysql_query('blah'); would have exactly the same result as mysql_query('blah;');

saga

Dec 1 2005, 07:20 AM

you should remember that mysql_query() is a function that accepts strings... therefore as what Spectre have said you should put it in between ' ' as you would in a normal string... but if you use ' inside your query then use the " instead...

like this one -> mysql_query("SELECT * FROM tablename WHERE name='you'");

or your could always code it this way which is more often used mehtod of coding

query = "SELECT * FROM tablename WHERE name='you'";
return = mysql_query(query);

i hope this helps... if not.. well too bad

Spectre

Dec 1 2005, 08:09 AM

Certainly true, although I would still recommend using single quotes where possible and simply escaping any other single quotation marks which are required to appear in the query:

CODE

'SELECT * FROM tablename WHERE name=\'you\'';

Using double quotes slows the operation down. Although it probably wouldn't affect small sites or scripts that aren't used a great deal, those which operate constantly will start to notice it. Although it's sometimes easier and more practical to use double quotes, in my opinion, it's usually a better idea and general good coding practice to use single quotes and simply escape any instances required to appear in the string, as well as adding variables outside of it (eg. 'SELECT * FROM table WHERE field =\'' . $variable . '\' LIMIT 3').

kakingho

Dec 2 2005, 06:36 AM

well~

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`;);

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`);

CODE

mysql_query('ALTER TABLE `xxx` ORDER BY `no`');

CODE

mysql_query('ALTER TABLE \'xxx\' ORDER BY \'no\'');

CODE

mysql_query("ALTER TABLE `xxx` ORDER BY `no`");

CODE

mysql_query("ALTER TABLE 'xxx' ORDER BY 'no'");

I finished testing.
All of above cannot work!!
I want to know whether php can use order function.

Spectre

Dec 2 2005, 10:24 AM

PHP communicates directly with MySQL, and provided the user you are accessing the database with has the correct privelages, any command can be executed. Which would lead me to think you're doing something wrong somewhere else in the code.

kakingho

Dec 2 2005, 02:38 PM

QUOTE(Spectre @ Dec 2 2005, 06:24 PM)

So.....what's wrong with the code??
Please correct it~~

Latest Entries

leiaah

Dec 17 2005, 09:49 PM

Are you trying to update the actual items in your table or just the whole table? Maybe Alter is not the right word to use, try UPDATE if you want to "update" or edit items in table xxx. I'm not sure with this one but you can give it a try.

$query = "update xxx set field1='field1_entry' where ID='1' ";

mysql_query($query);

kakingho

Dec 9 2005, 02:14 PM

QUOTE(pawitp @ Dec 7 2005, 06:46 PM)

Everyone mentioned it! You used

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`) or die ("Error:".mysql_error());

when you're supposed to have the quotes!

Try this on line 9.

CODE

mysql_query("ALTER TABLE 'xxx' ORDER BY 'no'") or die ("Error:".mysql_error());

P.S. Please understand this! Replace the line, OK?

pawitp, by using Post #8 data,
I tested different kind of quotes and I now find that quotes MUST NOT be added around table and colunm.

However, in this topic, many visitors just asked me to change the quote's sign or omit the semi colon.
So I think many people miss this rule.
>> quotes MUST NOT be added around table and colunm.
By the way , thanks for no9t9's help~~

Hope no one make this mistake again ~

----------------------------------------------------------------------
SUMMARY
Only this code can run~

CODE

mysql_query('ALTER TABLE xxx ORDER BY no');

All of following codes CANNOT work.

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`;);

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`);

CODE

mysql_query('ALTER TABLE `xxx` ORDER BY `no`');

CODE

mysql_query('ALTER TABLE \'xxx\' ORDER BY \'no\'');

CODE

mysql_query("ALTER TABLE `xxx` ORDER BY `no`");

CODE

mysql_query("ALTER TABLE 'xxx' ORDER BY 'no'");

no9t9

Dec 7 2005, 06:22 PM

I didn't see that you were using ` instead of ' ... but after seeing the error output is is obviuos.

You should never use ` as a quote! You don't need the quotes around the table and column name anyway. Just remove them.

That should fix it.

pawitp

Dec 7 2005, 10:46 AM

Everyone mentioned it! You used

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`) or die ("Error:".mysql_error());

when you're supposed to have the quotes!

Try this on line 9.

CODE

mysql_query("ALTER TABLE 'xxx' ORDER BY 'no'") or die ("Error:".mysql_error());

P.S. Please understand this! Replace the line, OK?

kakingho

Dec 7 2005, 10:02 AM

Here is my full report.

User name , password, permission,etc ..
all are normal~

1. can run successfully ( this code is for testing only)

CODE

<?
$ip="localhost";
$user="xxx";
$pw="xxx";

$link=mysql_connect($ip,$user,$pw) or die ("Error:".mysql_error());

mysql_select_db("xxx") or die ("Error:".mysql_error());
//mysql_query(ALTER TABLE `xxx` ORDER BY `no`) or die ("Error:".mysql_error());

mysql_query("UPDATE xxx SET
ip='test' ,password='test' where no=41");

mysql_close($link);
?>

2. can run this code in phpmyadmin's sql query directly

CODE

ALTER TABLE `xxx` ORDER BY `no`

3. cannot run this code in phpmyadmin's sql query and a error is shown

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`)

error message

QUOTE

#1064 - You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'mysql_query(ALTER TABLE `xxx` ORDER BY `no`)' at line 1

4. After run this file, a error is shown.

CODE

<?
$ip="localhost";
$user="xxx";
$pw="xxx";

$link=mysql_connect($ip,$user,$pw) or die ("Error:".mysql_error());

mysql_select_db("xxx") or die ("Error:".mysql_error());
mysql_query(ALTER TABLE `xxx` ORDER BY `no`) or die ("Error:".mysql_error());

//mysql_query("UPDATE xxx SET
ip='test' ,password='test' where no=41");

mysql_close($link);
?>

error message:

QUOTE

Parse error: parse error, unexpected T_STRING in /home/xxx/public_html/test.php on line 9

line 9 means

CODE

mysql_query(ALTER TABLE `xxx` ORDER BY `no`) or die ("Error:".mysql_error());

* I manage the table into descending order before every testing.
* phpmyadmin version: 2.6.4-pl2
* php version: 4.3.10
* PERL version: 5.8.4

please help to solve this strange problem~~

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