输出有问题。 错误的确切提取次数少于返回的行数？

Question

I am brand new to PL/SQL and I am having trouble with the output of this code. I have a populated employee table that contains the employee name, job, pay, id, etc. What I need is for my output to display as following:

Employee Name:       Johnson
Job:                 Service Writer
Total Pay:           $32,000

I keep getting the error exact fetch returns more than rows requested

ACCEPT p_1 PROMPT 'Please enter the Employee ID:'

DECLARE
   v_eid     employee.employee_id%TYPE := &p_1;
   v_name    employee.employee_name%TYPE;
   v_job     employee.job%TYPE;
   v_pay     employee.salary%TYPE;
BEGIN
   SELECT employee_name, job, salary
   INTO v_name, v_job, v_pay
   FROM employee;
   DBMS_OUTPUT.PUT_LINE('Employee Name: ' || v_name);
   DBMS_OUTPUT.PUT_LINE('Job: ' || v_job);
   DBMS_OUTPUT.PUT_LINE('Total Pay: ' || v_pay);
END;

I think I am close? Any help would be great!

Answer 1

Your SELECT statement returns more than one row which means the SELECT INTO statement will fail with your "exact fetch returns more than requested number of rows" error.

Try adding a WHERE clause that will mean the SELECT statement will only ever return one row. I'm guessing by your code, you want to do something like this:

ACCEPT p_1 PROMPT 'Please enter the Employee ID:'

DECLARE
   v_eid     employee.employee_id%TYPE := &p_1;
   v_name    employee.employee_name%TYPE;
   v_job     employee.job%TYPE;
   v_pay     employee.salary%TYPE;
BEGIN
   SELECT employee_name, job, salary
   INTO v_name, v_job, v_pay
   FROM employee
   WHERE employee_id = v_eid;

   DBMS_OUTPUT.PUT_LINE('Employee Name: ' || v_name);
   DBMS_OUTPUT.PUT_LINE('Job: ' || v_job);
   DBMS_OUTPUT.PUT_LINE('Total Pay: ' || v_pay);
END;

Check out http://www.techonthenet.com/oracle/errors/ora01422.php for more info regarding the error.