Write a PL/SQL block to swap the salaries of any two employees

Wu Ruan asked the group · Posted on 3/22/2015 11:17:17 AM

Tip: You can define two variables and enter the numbers of the two employees from the keyboard, if the two numbers are the same, throw a custom exception, otherwise the salary is swapped.

create table yuan(
y_id number,
y_maney number
);
commit;
insert into yuan values(1,200);
insert into yuan values(2,200);
insert into yuan values(3,500);
insert into yuan values(4,2000);
select * from yuan;
declare
yc exception;
a_yuan yuan.y_id%type := '&请输a入员工号';
b_yuan yuan.y_id%type := '&请输b入员工号';
a_m yuan.y_maney%type;
b_m yuan.y_maney%type;
begin
select y_maney into a_m from yuan where y_id=a_yuan;
select y_maney into b_m from yuan where y_id=b_yuan;
if a_yuan=b_yuan then
raise yc;
else
update yuan set y_maney=a_m where y_id=b_yuan;
update yuan set y_maney=b_m where y_id=a_yuan;
end if;
exception
when yc then
dbms_output.put_line('错误，不能和自己互换');
end;

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[Communication] Write a PL/SQL block to swap the salaries of any two employees

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