This is a data type and refers to an expression or variable that can have only a true or false value e.g. on/off, true/false, male/female
Outside of the narrow database meaning, there is a whole branch of mathematics called 'Boolean Algebra' that is dedicated to solving logic problems with maths. Boolean algebra is widely used in designing computers, after all computers are all about logic.
The Boolean main 'operators' are
A AND B : Statement is TRUE if both A and B are true
A OR B : Statement is TRUE if either A or B or both are true
A NOT B : Statement is TRUE if A is true but B is not true
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Boolean