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

php wont update my db
hello,

sorry for posting in mysql forum but i dont know where exactly is the problem but here

records between 2 dates
Hello all,

I have a date tracked table which contains effective_start_date and effective

breaking a text file into paragraphs based on strings
I have a text file of email addresses that is all squished together. It looks like this:

abc

Code doesn't print what i wanted it too. Please help!
Hi there,

I wrote this code to mae it so that in the form before it that the user said their

login page does not execute a else statement
I've created a login page using sessions.
When an incorrect user name or password is entered then

b+ tree
Hi
can every body help me about b+ tree ?(insert & delete)

GMail like Chat in ASP.NET
Hi,Can anyone suggest me, how to incorporate GMail like chat in my existing ASP.Net application.I wa

Create multiple (n) arrays
Hi there,

I have the following need:

I have 2 arrays (coming from a databases)

passthru() help
Hi everyone,
I'm new to the forum and to PHP. I have some pretty good experience writing shell sc

Grouping and sorting results
Please help with this query.

I have 2 tables in a database, countires and cities. states look