NOT NULL « Constraints « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Constraints
  3. NOT NULL
1.NOT NULL Column Constraints
2.Change a column to 'not null' with null data in it
3.NOT NULL CONSTRAINT
4.Adding constraint that checks values and prohobits nulls
5.Create a SQL collection type that disallows null values
6.ORA-01400: cannot insert NULL into
7.Add not null constraint to different columns
8.alter table dept modify emp_count NOT NULL