why this query can delete duplicates ?

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

why this query can delete duplicates ? Anybody can give me the detailed explanation ?

Thanks

select salary from employees union select salary from employees;

Your Answer:

Login to answer

Other forums

Trouble with a select list
Hello All!
I was wondering if any of you guys could help me with a small problem I'm having!

Storing/displaying image urls in a database?
Hi
Basically I have the following scenario:
User chooses picture from list. Picture info is ad

Legal Issues for SAP ERP o ERP in general
Hi experts,

Can someone please help me finding some documentation about legal issues tha

mysql UNION | warning mysql_fetch_array !!
Code: <?php
$i = 0;
$query1="SELECT * FROM `products` WHERE `div

Advice on how to delete a mysql row using my form
Hi,

I am very new to php and am struggling to work out how to delete a portfolio item (a row

Hit counter updating once per IP - IP HIT COUNTER
I have a hit counter, for the amount of views on a tutorial.
It'll do the query and then do..

mysq_num_rows
Hi,

I want to use:

Code: if(mysql_num_rows($ergebnis2)==2)
how can the value 2, be

Basic Forum Tutorial
Hi, I'm new to PHP. I want to build a basic forum for my site using PHP and MySQL. I've searched t

Problem with PHP code- simple contact form
Hi Folks,
I'm relativily new to PHP; I know HTML and CSS stuff but I have a problem- I have a co

Question about the upload of large files
Hi there,

I have a question about the upload of large files, like videos (files generally abo