Add constraint for date type column

   
SQL>
SQL> CREATE TABLE product (
  2       product_name  VARCHAR2(25),
  3       product_price NUMBER(4,2),
  4       last_stock_date date
  5       );

Table created.

SQL>
SQL> ALTER TABLE product ADD (
  2       CONSTRAINT reasonable_date CHECK(
  3            TO_CHAR(last_stock_date, 'YYYY-MM-DD') >= '2001-12-31'
  4            )
  5       );

Table altered.

SQL>
SQL>
SQL> drop table product;

Table dropped.

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Add constraint for date type column : Constraint Check « Constraints « Oracle PL / SQL

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