why a primary key is a toggle key?
Answers
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A toggle key is used to alternate the input mode of a group of keys on a keyboard. Some examples include Caps Lock, Insert, Num Lock, and Scroll Lock. Caps Lock is the most commonly used toggle key, and capitalizes all letter input when turned on.
A primary key, also called a primary keyword, is a key in a relational database that is unique for each record. It is a unique identifier, such as a driver license number, telephone number (including area code), or vehicle identification number (VIN). A relational database must always have one and only one primary key.
A toggle key toggles the input from other keys on the keyboard between different input modes. The most commonly used toggle key is the caps lock key, which alternates the letter keys between uppercase and lowercase.
toggle key toggles the input from other keys on the keyboard between different input modes. The most commonly used toggle key is the caps lock key, which alternates the letter keys between uppercase and lowercase. Num lock is another toggle key which helps to input numerals from the numeric keyboard and is turned on by default. Another example of a toggle key is the scroll lock key, which allows arrow keys to scroll through window's contents and allows users to scroll without depending on the scroll bar. The insert key is another example of a toggle key, and it toggles between overtype mode and insert mode while entering text.
A toggle key, unlike modifier keys, is turned on or off when pressed —they need not be held down while pressing other keys. Most keyboards have lights indicating whether the keys are switched on or off. Some operating systems and applications also display the toggle key status on the screen.