Pl/SQL Beginner Problem, Selecting all records?

SET SERVEROUTPUT ON;

DECLARE
student_rec student%ROWTYPE;
BEGIN
SELECT *
INTO student_rec
FROM student
WHERE student_id = 156 ;
DBMS_OUTPUT.PUT_LINE ('Last Name : '|| student_rec.last_name || chr(10)||
'First Name : '|| student_rec.first_name || chr(10)||
'Phone Number : '|| student_rec.phone || chr(10)||
'Reg Date : '|| student_rec.registration_date);
EXCEPTION
WHEN no_data_found THEN
RAISE_APPLICATION_ERROR(-20001, 'Student with id = 156 is not in the Database');
WHEN others THEN
DBMS_OUTPUT.PUT_LINE(SQLCODE || ' '|| substr(SQLERRM,1,80));
END;
.

In the above code it selects the information for the student with the id of 156, how do I change it so that it selects all students from the table instead of just the one?

Any help appreciated.just remove the condition tht where student id = 156:

SELECT *
INTO student_rec
FROM student

above script will select all the student in student and store it into the sudent_rec .

RAISE_APPLICATION_ERROR(-20001, 'Student with id = 156 is not in the Database');

when you want to raise the exeception just write it ther is no record in the table instad of student with id= 156 is not in the database.|||Hi,

Use a cursor & remove the Hard coded value 156 in the query.

Originally posted by iknownothing
SET SERVEROUTPUT ON;

DECLARE
student_rec student%ROWTYPE;
BEGIN
SELECT *
INTO student_rec
FROM student
WHERE student_id = 156 ;
DBMS_OUTPUT.PUT_LINE ('Last Name : '|| student_rec.last_name || chr(10)||
'First Name : '|| student_rec.first_name || chr(10)||
'Phone Number : '|| student_rec.phone || chr(10)||
'Reg Date : '|| student_rec.registration_date);
EXCEPTION
WHEN no_data_found THEN
RAISE_APPLICATION_ERROR(-20001, 'Student with id = 156 is not in the Database');
WHEN others THEN
DBMS_OUTPUT.PUT_LINE(SQLCODE || ' '|| substr(SQLERRM,1,80));
END;
.

In the above code it selects the information for the student with the id of 156, how do I change it so that it selects all students from the table instead of just the one?

Any help appreciated.|||When I remove the WHERE statement, I get an error when I run it saying
"-1422 ORA-01422: exact fetch returns more than requested number of rows"|||Hi,

Use CURSOR to avoid this error. Because you can fetch only one row into the record type student_rec . When the value 156 is harcoded in the query , exactly one row is fetched into student_rec . So it works fine. But once you remove the hard coded value 156 from the query, all the records are fetched . Since the record type student_rec can accept only one value, it displays the error ORA-01422: exact fetch returns more than requested number of rows. To avoid this error & fetch all the records into student_rec, use a CURSOR.

Originally posted by iknownothing
When I remove the WHERE statement, I get an error when I run it saying
"-1422 ORA-01422: exact fetch returns more than requested number of rows"|||Its ok, fixed it! Thanks.|||As an aside from your question, you should get out of the habit of doing this:

EXCEPTION
WHEN no_data_found THEN
RAISE_APPLICATION_ERROR(-20001, 'Student with id = 156 is not in the Database');
WHEN others THEN
DBMS_OUTPUT.PUT_LINE(SQLCODE || ' '|| substr(SQLERRM,1,80));
END;

All that does is potentially hide errors from the user and allow inconsistent partial transactions to be committed. It should be simply:

EXCEPTION
WHEN no_data_found THEN
RAISE_APPLICATION_ERROR(-20001, 'Student with id = 156 is not in the Database');
END;