Table constraints are validations which can be applied on a group of columns of the table. For exp – CHECK, UNIQUE etc.
Column level constraints are validations which can be applied on individual columns of the tables. For exp – NOT NULL, DEFAULT etc.
| Table Constraints | Column Constraints |
|---|---|
| It appears at the end of table definition | It appears with the column of table definition |
| NOT NULL is not allowed | NOT NULL is allowed |