SQL Tables
SQL is inspired by this mathematical model.
Names are changed, and for pragmatic reasons the SQL model does not try to be mathematically pure.
A relation is replaced by a table.
The individual tuples in the relation are called rows.
The domain sets of the relation are replaced by columns or attributes.
Typing is not as strict as the mathematical model suggests. We define the allowed values of a column in terms of a limited set of predefined types, rather than actual sets.