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;

No comments posted yet

Your Answer:

Login to answer
203 Like 28 Dislike
Previous forums Next forums
Other forums

SAP Business Suite
Hi all:

Within the SAP Business Suite solution I would like to ask you the main differenc

Rounding a number queried from a database
I know that to display a rounded number you just do echo "round($number)";. But how would

Is there a way to override built in php functions without APD?
I am trying to use the
rename_function()
override_function()
options that are built into

ScriptManager History and Opera Issue
I am having an issue in opera with the ScriptManager. I have a ScriptManager on a page with history

Shopping Cart
Can anyone direct me to a Simple, Basic structure of a shopping cart.
New to classes. I want to s

Page not Loading After Test
Hey All

It seemed that an inlcude statement wasn't working for some reason, so I tried a more

Recording popularity by day, week.. all time?
Hey everyone, I'm creating a site designed around users uploading music. How can I implement a syste

login to other site by sending post variables
hey,

here is my problem: my school gave me a mail account for school-stuff use. they mail us

Linux socket programming
Where can I find a good introduction to socket programming?

Change of partner analyse in sales orders
Hello,

I changed the partner analyse for sales orders and added a new mandatory partnerro

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash