State a check constraint that check relation between two columns

  


SQL> -- State a check constraint that check the value of more than one column.
SQL> -- The following example makes sure that the value of begin_ is smaller than the value of end_.
SQL>
SQL> create table myTable(
  2    begin_   number,
  3    end_     number,
  4    value_   number,
  5    check (begin_ < end_)
  6  );

Table created.

SQL>
SQL> insert into myTable values(1, 3, 4);

1 row created.

SQL> insert into myTable values(2000, 3, 5);
insert into myTable values(2000, 3, 5)
*
ERROR at line 1:
ORA-02290: check constraint (SYS.SYS_C004432) violated


SQL> insert into myTable values(2, 3 ,6);

1 row created.

SQL>
SQL> select * from myTable;

    BEGIN_       END_     VALUE_
---------- ---------- ----------
         1          3          4
         2          3          6

SQL>
SQL> drop table myTable;

Table dropped.

SQL>
SQL>

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State a check constraint that check relation between two columns : Constraint Check « Constraints « Oracle PL / SQL

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