sppu-te-comp-content/DatabaseManagementSystems
sppu-te-comp-content/DatabaseManagementSystems
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Made changed to data inserted in table. Added another exception and changed outputs to be more polite.

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K 2024-11-10 19:31:16 +05:30
parent ceabc021bd
commit 4d878d51ca
Signed by: notkshitij
GPG Key ID: C5B8BC7530F8F43F
1 changed files with 12 additions and 10 deletions
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Practical/Practical Exam/PL-SQL/P4 - PL-SQL Block.md
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@ -1,7 +1,6 @@
# P4 - PL/SQL block # P4 - PL/SQL block
**Problem Statement:** **Problem Statement:** Write a PL/SQL block for following requirements and handle the exceptions. Roll no. of students will be entered by the user. Attendance of roll no. entered by user will be checked in the Stud table. If attendance is less than 75% then display the message “Term not granted” and set the status in stud table as “Detained”. Otherwise display message “Term granted” and set the status in stud table as “Not Detained”. Student (Roll, Name, Attendance, Status)
Write a PL/SQL block for following requirements and handle the exceptions. Roll no. of students will be entered by the user. Attendance of roll no. entered by user will be checked in the Stud table. If attendance is less than 75% then display the message “Term not granted” and set the status in stud table as “Detained”. Otherwise display message “Term granted” and set the status in stud table as “Not Detained”. Student (Roll, Name, Attendance, Status)
--- ---
@ -20,11 +19,11 @@ CREATE TABLE Student(
## Inserting data ## Inserting data
```sql ```sql
INSERT INTO Student VALUES (1, 'Tanmay', 76, 'Not Yet Reviewed'); INSERT INTO Student VALUES (1, 'Tanmay', 76, NULL);
INSERT INTO Student VALUES (2, 'Rajesh', 80, 'Not Yet Reviewed'); INSERT INTO Student VALUES (2, 'Rajesh', 80, NULL);
INSERT INTO Student VALUES (3, 'Tejas', 88, 'Not Yet Reviewed'); INSERT INTO Student VALUES (3, 'Tejas', 88, NULL);
INSERT INTO Student VALUES (4, 'Machkar', 35, 'Not Yet Reviewed'); INSERT INTO Student VALUES (4, 'Machkar', 35, NULL);
INSERT INTO Student VALUES (5, 'Jayashree', 74, 'Not Yet Reviewed'); INSERT INTO Student VALUES (5, 'Jayashree', 74, NULL);
``` ```
@ -36,6 +35,7 @@ DECLARE
p_roll Student.Roll%type; p_roll Student.Roll%type;
nodata EXCEPTION; nodata EXCEPTION;
BEGIN BEGIN
DBMS_OUTPUT.PUT_LINE('Enter roll number: ');
p_roll := &p_roll; p_roll := &p_roll;
IF (p_roll < 0) THEN IF (p_roll < 0) THEN
@ -45,15 +45,17 @@ BEGIN
SELECT Attendance INTO p_att FROM Student WHERE Roll = p_roll; SELECT Attendance INTO p_att FROM Student WHERE Roll = p_roll;
IF (p_att < 75) THEN IF (p_att < 75) THEN
DBMS_OUTPUT.PUT_LINE('Term not granted!'); DBMS_OUTPUT.PUT_LINE('Term not granted to roll no. ' || p_roll);
UPDATE Student SET Status = 'Detained' WHERE Roll = p_roll; UPDATE Student SET Status = 'Detained' WHERE Roll = p_roll;
ELSIF (p_att >= 75) THEN ELSIF (p_att >= 75) THEN
DBMS_OUTPUT.PUT_LINE('Term granted!'); DBMS_OUTPUT.PUT_LINE('Term granted to roll no. ' || p_roll);
UPDATE Student SET Status = 'Not Detained' WHERE Roll = p_roll; UPDATE Student SET Status = 'Not Detained' WHERE Roll = p_roll;
END IF; END IF;
EXCEPTION EXCEPTION
WHEN nodata THEN WHEN nodata THEN
DBMS_OUTPUT.PUT_LINE('Enter valid rollno!!'); DBMS_OUTPUT.PUT_LINE('Please enter a valid roll number.');
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE('Error occured. Error: ' SQLERRM);
END; END;
/ /