Keys

Think of constraints in a database as rules that ensure data behaves properly, just like rules in a game. For instance, if you’re playing basketball, you can’t use your hands to touch the ball unless you’re dribbling or shooting. Similarly, constraints in a database ensure that data follows certain rules, like not allowing duplicate values in a column or making sure each student has a unique student ID. ...

Think of constraints in a database as rules that ensure data behaves properly, just like rules in a game. For instance, if you’re playing basketball, you can’t use your hands to touch the ball unless you’re dribbling or shooting. Similarly, constraints in a database ensure that data follows certain rules, like not allowing duplicate values in a column or making sure each student has a unique student ID. ...