pl-sql errror on select HR schema - sql

Question

i want to do something like that.. but in a function.. select * from employees where employee_id = &employee_id in HR schema of oracle
Q: Create Function “SEARCH_EMPLOYEE” that receives an Employee ID and returns all its attributes through an output parameter with a data structure that represents all its information
R:
Create or replace FUNCTION get_complete_employee (&in_employee_id IN NUMBER)
AS person_details;
BEGIN
SELECT * --'Name-'||first_name||' '|| last_name
into person_details
FROM employees;
Dbms_output.put_line(person_details);
-- END get_complete_employee;
end;
i have a error of sintax i guess..
i don't know what is wrong

Answer 1

If you are learning how to create the function which returns entire row of the table then following is the basic example of doing the same:
Table data:
SQL> select * from EMP;
EMP_ID EMP_NAME E
---------- -------------------- -
10 John N
20 May Y
SQL>
Function:
SQL> CREATE OR REPLACE FUNCTION GET_COMPLETE_EMPLOYEE (
2 IN_EMPLOYEE_ID IN NUMBER
3 ) RETURN EMP%ROWTYPE AS
4 MY_ROWTYPE EMP%ROWTYPE;
5 BEGIN
6 SELECT
7 * --'Name-'||first_name||' '|| last_name
8 INTO MY_ROWTYPE
9 FROM
10 EMP
11 WHERE
12 EMP_ID = IN_EMPLOYEE_ID;
13
14 RETURN MY_ROWTYPE;
15 END;
16 /
Function created.
SQL>
Calling the function and result:
SQL> SET SERVEROUT ON
SQL>
SQL> DECLARE
2 EMPTYPE EMP%ROWTYPE;
3 BEGIN
4 EMPTYPE := GET_COMPLETE_EMPLOYEE(10);
5 DBMS_OUTPUT.PUT_LINE(EMPTYPE.EMP_NAME);
6 END;
7 /
John
You must have to handle multiple exception scenarios in real-world coding.
Cheers!!