check if value exists

Posted on 16th Feb 2014 07:03 pm by admin

I have googled this for a while and I am getting lots of different results. Is there a standard method used for checking to see if a value exists in a database before inserting a value? I have a form, you type your name and push submit, it inserts the name into the database and then the name shows up in a list. Right now, it accepts the same values. I want to add a check to say

if name exists, do something

Your Answer:

Login to answer

Other forums

Mail Form receiving emails with no content
Hi, I hope someone here can help me.
I have a simple form in my website, it was working OK, after

Quick fix: Conditional statement with an array
Hi, I'm getting the temperature value off of the Environment Canada website along with the icon file

ob_ dynamic content
i was wondering about the potential to use ob to create a <div then remove it when the page

How to clone an SAP ECC using bacup tape on z/os?
We want to clone our production to a different SID using backup tape.

Upload file!
Ok i have a form..
Code: <form name="form1" method="post" action=&quo

DateObject and Nulls
Hi all,

I have an array mapped to a value object. One of the items in the array is a PHP Date

Socket problem
Hello,

Earlier I posted about my problem with my socket script. It took up to 100% CPU usage.

Big O & time complexity ???
can you help me how to calculate the Big O & time complexity for any algorithm and c++ program pleas

Does deleting the spmlog directory critical?
Hi Everyone,

Please, hope you could help me. We're having problems with the SAP backup. I

When file included, REMOTE_ADDR is server's?
I have an index file that handles my site, basically index.php?page=ip will activate "require('