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checking for duplicates

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#1 leeroy1

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Posted 06 October 2004 - 01:23 PM

Is it possible to execute a sql statement or something in order to check if a field a user has enter already exists in a table, and if it does tells the user and does not try to submit the form? Or is there a better way to do this?

#2 x_ash

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Posted 07 October 2004 - 03:01 AM

i think mysql statement can already detect if a certain user enters a field that already exists. I has a prompt saying "Duplicate entry" on it. If u want it more formal, you may add message box on it using javascript.

hope this help :mellow:

#3 jerry187

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Posted 07 October 2004 - 04:49 AM

Do you mean looking for a value and telling the user if it already exists?

$result = mysql_query("SELECT column_name FROM tbl_name WHERE column_name='$value'");

if (!mysql_num_rows($result > 0) {
// code here

Just Call Me Jerry

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