SQL> create table salary
2 ( grade NUMBER(2) constraint S_PK primary key
3 , lowerlimit NUMBER(6,2) constraint S_LOWER_NN
4 not null
5 constraint S_LOWER_CHK
6 check (lowerlimit >= 0)
7 , upperlimit NUMBER(6,2) constraint S_UPPER_NN
8 not null
9 , bonus NUMBER(6,2) constraint S_BONUS_NN
10 not null
11 , constraint S_LO_UP_CHK check
12 (lowerlimit <= upperlimit)
13 ) ;
Table created.
SQL>
SQL>
SQL> drop table salary;
Table dropped.