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

Where do I put CRON code
So I've figured out alot about how to automatically run a php function. I can't figure out where to

writing my own sobel filter convolution - something is wrong
I am trying to keep it very simple, I cant see anything wrong with my logic, could anybody help poin

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result
what is wrong with this

Code: [Select]<?php
if ($_SERVER['HTTP_REFERER'])
{

SMTP server...
I recently found a tutorial online on SMTP authentification for sending emails from webpages, here i

LSB (PHP 5.3) problem with static value!
hello,

i'm having a problem. static::$text variable gets lost at some point. can someone plea

returning data from an ssh2_exec()
here's what i got.


$conn = ssh2_connect($this->_host);
ssh2_auth_password($c

Phase Error I can't seem to find :(`
Hey guys, I can seem to find my phase error on this. I am getting this error

[error]
Pars

Not connecting to DB using ruby, error:env.c:257:in oci8lib.so: ORA-12154:
Hi All,

I am trying to connect to the database server from the client server using ruby and f

php redirecting
i wont open a new thread but i have a question about redirecting....
i wonder why my code doesnt

single values into sql field
i have a form which i want the user to able to select multiple answers. But i want the answers to be

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