Syntax for adding check constraint to a column

   

SQL> --CREATE TABLE <table schema>
SQL> --   (key attribute NOT NULL,
SQL> --    attribute        attribute type,
SQL> --    attribute        attribute type
SQL> --    [CHECK (<attribute value> IN (set of values))]
SQL> --    PRIMARY KEY      (key attribute));
SQL>
SQL> --Example:
SQL>
SQL> CREATE TABLE emp
  2     (id         VARCHAR2(10)      NOT NULL,
  3      name       VARCHAR2(20),
  4      address    VARCHAR2(35),
  5      emp_type   VARCHAR2(8)
  6        CHECK(emp_type IN ('Designer', 'Worker')),
  7      PRIMARY KEY (id));

Table created.

SQL>
SQL> drop table emp;

Table dropped.

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19.	Could only contain three values
20.	Must be upper case

Syntax for adding check constraint to a column : Constraint Check « Constraints « Oracle PL / SQL

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