Answer:
Explanation:
A relational database is designed to enforce the uniqueness of primary keys by allowing only one row with a given primary key value in a table. A foreign key is a column or a set of columns in a table whose values correspond to the values of the primary key in another table.
B. It is a code that creates multiple copies on loading and damages the system
The expression NOT (3+2=7) evaluates as TRUE because is is NOT the case that 3+2=7.
Let me know if you have any questions.
Chemical reactions in the material used to make matches, and the cardboard... so hope this helps :)
NOTE: im not to good at this stuff so i rlllllly hope it helps