I would like to know about the advantages and disadvantages of primary key, foreign key and unique key. Is it possible to use two null values in unique key?
 

Can you please suggest a normalization pattern that can be implemented in a scenario where data have the same invoice number but different information like cost, supplier etc.?

Hi,

I’m just new on this networking set-up. I hope i could get some idea here. I’m planning to set up small network at home. I have two PC, that i want to network. I want them in a 1 workgroup. I configure it in properties -> sharing. How come...

Hi,

I have a bad experienced on FACEBOOK. One day accidentally i forgot to log out my account and after in just an hour all of my friends received this message “Hello” when my friends made a response it message like this “Wanna laugh?”

Then next message is “ I saw...

This is my question regarding on how to connect PC remotely, I am in the US and my client is in abroad with a different provider. Does he gave me permission to connect to her PC or not? What kind of information would I need?

I want to ask your opinions on what is the best internet provider here in the Philippines? Between 2 PC, I want to have a reliable, unlimited access, the provider should have a bandwidth on demand service because sometime we upload many files especially the end of the month. Forward your suggestion please.

How can I send emails to my client automatically using time set program email  were the program automatically sends email everytime you program it to DATE and TIME. I work in a company that sends bulk of email everyday in a different schedule or time, this is more on...

Hi, do you have an idea on what’s the fastest browser right now? I’m using Internet Explorer and it very slow, sometimes the whole picture will not totally display especially on  especially on social networking sites like FACEBOOK and TWITTER. The screen has a message “ YOUR BROWSER IS...

I’m having a BPO business for 3D Animation. We upload bulk files from US back to Philippines 24/7. We are currently using DSL highest plan because this is the only Telco. we have here. Even if we used the highest plan available, the result still not convincing on it’s...

My friend has a call center company here in Philippines and I work as an I.T. We applied leased lines because we believe it can solve our problems n terms on fast and reliable internet access. Now, when we test the speed going to KOREA because that’s our main...