检查语句添加约束

Question

create table sallaary(

E_ID  number (10) ,

bank_type varchar(10),

creditcardnumber number(12) primary key  ,

 bonus number(5),

 salary_date date ,

 work_hours number (3),

 constraint check_hours check (work_hours > 40 ) 

constraint sallary2_emp_fk foreign key (E_ID) references salloonee_employee1

);

Now, this is my code. The idea of the first constraint "check_hours " is to add a bonus to the employee if his work hours exceeded 40 hours but I don't know how to write it

Note: the first constraint "check_hours " is not complete

Answer 1

Hmmm. . . I think you want a bonus when the hours exceeds 40. If so:

constraint check_hours check (not (bonus = 0 and work_hours > 40))

Or equivalently:

constraint check_hours check (bonus > 0 or work_hours <= 40)

Or, if bonus can be NULL :

constraint check_hours check (not (coalesce(bonus, 0) = 0 and work_hours > 40))