Constraints
A constraint is yet another object that exists only within the confines of a table. Constraints are much like
they sound; they confine the data in your table to meet certain conditions. Constraints, in a way, compete
with triggers as possible solutions to data integrity issues. They are not, however, the same thing;
each has its own distinct advantages.
A constraint is yet another object that exists only within the confines of a table. Constraints are much like
they sound; they confine the data in your table to meet certain conditions. Constraints, in a way, compete
with triggers as possible solutions to data integrity issues. They are not, however, the same thing;
each has its own distinct advantages.
Tags:
Database