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A relationship is established between two database tables when one table uses a foreign key that references the primary key of another table. This is the basic concept behind the term relational database. How a Foreign Key Works to Establish a Relationship A primary key uniquely identifies each record in the table. It is a type of candidate key that is usually the first column in a table and can be automatically generated by the database to ensure that it is unique....

Internet download and upload speeds are measured in bits per second (bps), with most residential connections in megabits per second (Mbps). Most internet service providers (ISP) offer various plans and typically charge higher prices for the fastest speeds available. But over the last decade, the average residential internet speeds in the US have increased rapidly, to the point where your ISP’s top-tier plans may offer more than you need. This article will help you make sense of what a good download and upload speed are for everyday tasks so you can pick the internet plan that best suits your needs....

A modem converts data to a signal so it can be easily sent and received over a phone line, cable, or satellite connection. For transmission over an analog telephone line—which was once the most popular way to access the internet—the modem converts data between analog and digital formats in real time for two-way network communication. In the case of the high-speed digital modems popular today, the signal is much simpler and doesn’t require the analog-to-digital conversion....

QD-QLED is essentially a combination of technologies that uses quantum dots in between LCD panel layers to replace the color filter in front of an LED backlight to emit very saturated primary colors. What a Quantum Dot Is A quantum dot is a manufactured nanocrystal with semiconductor properties that can enhance the brightness and color performance displayed in still and video images on an LCD screen. Quantum dots and QLED refer to the same technology....

When dealing with an unlocked or locked phone, the question is whether or not the device can work on a specific wireless network that’s different than the network the phone was designed to work on. What is an Unlocked Phone? An unlocked smartphone is a phone that can work with any cell phone carrier. Some phones are not unlocked and so they can only be used on one provider like Verizon, or with just AT&T, or T-Mobile, etc....

Professional photographers rely on aperture to control the amount of light passing through to the camera’s image sensor. The term refers to the iris in the camera lens opening or closing to allow varying levels of light. The camera’s aperture is measured in f-stops. Aperture control performs two essential functions on a digital single-lens reflex camera. In addition to managing the amount of light passing through the lens—leading to brighter or darker images—it also controls depth of field, which is a technical term for how sharp or blurry objects appear beyond the object at the center of the camera’s focus....

Many a time, you try to find a specific location in Subnautica: Below Zero but to no avail. The biomes can get confusing and you can be lost in the mazes of this world. Now you also know that you are time-bound with your oxygen levels and other stats. So searching for the location can get tedious. What would help, is knowing the coordinates of that exact locations. You can do that in the game....

T-Mobile is investigating claims of a massive data breach that includes Social Security numbers, phone numbers, names, and even physical addresses. The claims originally were posted in what T-Mobile called an “underground forum.” Although the particular forum post does not mention T-Mobile by name, the seller of the data said it came from company servers. The hacker claims to have obtained data for over 100 million people, and even has the IMEI numbers for smartphones....

Released back in 2019, Teamfight Tactics is a spinoff of the famous League of Legends. Nevertheless, the game has still managed to gain growing popularity over the past few years. Your goal as a player is to be the last one standing as you take on seven other opponents in an online auto-battle. Your units are known as Champions that fight in the arena. They have different star levels which you can upgrade them to....

This week on Pureinfotech: Microsoft details the plans to incorporate a new file system into the Windows 8 ecosystem called ReFS or Resilient File System, that is going to bring data corruption recovery, capability to handle big capacity volumes, and much more, check out all the details — ReFS is the new Windows 8′s file system, Microsoft explains what to expect. For those who want to bring back the old Start Menu in Windows 8, but they also like the new Metro style Start Screen, this handy trick is going to be of great help — How to keep both an old style Start Menu and the Start Screen in Windows 8 [Trick]....

The Apple iPad is an excellent educational tool for kids of all ages. If you have little ones, free iPad apps for toddlers can entertain, engage, and educate safely and securely. We selected our 10 favorite free iPad apps for toddlers, rated according to design, educational content, and appeal. Try them out the next time you need a few distraction-free moments. Before you download apps, child-proof your iPad. Turn off in-app purchases to keep your toddler from accidentally buying something within the app....

Many gamers have an irresistible desire to introduce their non-gamer friends to the joy of playing video games. No console is better suited for this than the Wii, which was designed to appeal to people who don’t like game controllers. It can be tricky for a gamer to figure out what’s going to appeal to a non-gamer, so here are my choices for games that have a better than average chance of entrancing that girlfriend/boyfriend/mom/dad/secret-crush into the world of video games....

Vizio is one of the most trusted brands in televisions and home theater equipment, and the best Vizio TVs offer a range of smart features like voice controls, pre-loaded streaming apps, and the ability to mirror your smartphone or tablet screens for more ways to share photos, music and videos. Vizio also includes their proprietary WatchFree app with their newer models, providing over 150 free live channels for news, sports, and original content for anyone looking to cut the cord with their cable or satellite provider and move entirely towards streaming....

The Apple Maps app will gain a number of improvements after upgrading an iPhone or iPod touch to iOS 15. These new Apple Map features add more functionality and usability to Apple’s navigation service while still allowing long-time users to access the traditional features they know and love for driving, searching, and getting directions. Here are seven of the top new features iOS 15 brings to Apple Maps. iOS 15 Augmented Reality (AR) Walking Directions One of the coolest new features coming to Apple Maps with iOS 15 is the addition of Augmented Reality (AR) functionality....

If you’re still using the default messaging app that came with your Android phone, it’s time to branch out. These seven apps go beyond the basics with features such as customization, message prioritization, quick reply, beautiful designs, and compatibility with related apps. Many of them also boast responsive developers, so if you run into problems, you’re likely to get help fast. The information below should apply regardless of phone manufacturer....

The best Bluetooth headsets are for those who are on the phone constantly. Whether it’s for work, or you’re on the road, or you’re working around the house, if you have a constant stream of phone calls coming in, you’re going to want to answer those calls easily. Plus, answering calls hands-free is a liberating experience. Bluetooth headsets are designed to be really comfortable, have a long-lasting battery, and put a premium on call quality with great microphones and great headphones....

If you need more disk space for your console, you might want to look into an aftermarket hard drive for your PS4. Unlike the PS5, which includes an SSD expansion slot, the PS4 requires you to either connect a USB hard drive or physically open your PS4 and upgrade your internal storage. For anyone who hasn’t yet upgraded to the PS5, a hard drive is a great way to get more out of your last-generation console....

A good sound system requires a good subwoofer with an optimized bass response. It doesn’t matter how high-end or expensive the speakers are: Bass that sounds boomy or bloated can ruin the listening experience by drowning out higher frequencies or muddying the low end. But a tight, well-defined, evenly distributed bass can enhance the listening experience—be it for a home theater, stereo, or desktop speaker system. For audio systems that are meant to cover a large area or multiple rooms, several subwoofers can help maintain low-end clarity while delivering all the punch you could ask for....

Using codes and console commands provided by The Forest Cheat, you have an option to change the game on PS4 or PC. If you have been playing the survival game, you must have an idea about dozens of The Forest Cheat that can mess with practically everything in the game’s code. Do you know that there are certain The Forest cheats or codes that are required the game to be put into developer mode before they can work?...

There’s a ton of talk out there about changing your logon screen manually, but many people – particularly those who are more tech-illiterate – would like a program that can magically do this with the click of a mouse. If you’re one of the latter group of people, someone from Finland appears to have been listening to your grievances. Now, you can use Kirjaudu (which means “logon” in Finnish) and click a large button on the application to change that old, boring logon screen into a beautiful background....