Added content.

- Notes
- Practical (Databases, Handouts, Queries, Softcopies, Write-ups)
- Question Papers
- DISCLAIMER file and motto
Lastly, updated README file.

Practical/Assignment-A6/Queries-A6.md

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+# Database Queries for Assignment-A6
+
+## Creating tables
+
+```sql
+CREATE TABLE Stud_Marks (
+  roll INT,
+  name VARCHAR(255),
+  total_marks INT,
+  PRIMARY KEY (roll)
+);
+
+CREATE TABLE Result (
+  roll INT,
+  name VARCHAR(255),
+  class VARCHAR(255),
+  FOREIGN KEY (roll) REFERENCES Stud_Marks (roll)
+);
+
+```
+
+## Inserting data
+
+```sql
+INSERT INTO Stud_Marks VALUES (1, 'Kshitij', 1400);
+INSERT INTO Stud_Marks VALUES (2, 'Kalas', 500);
+INSERT INTO Stud_Marks VALUES (3, 'Himanshu', 995);
+INSERT INTO Stud_Marks VALUES (4, 'MEPA', 850);
+INSERT INTO Stud_Marks VALUES (5, 'Macho', 900);
+
+```
+
+## Procedure
+
+```sql
+CREATE OR REPLACE PROCEDURE proc_Grade (roll_no IN NUMBER) AS
+
+-- declare section
+  p_roll Stud_Marks.roll%TYPE;
+  p_name Stud_Marks.name%TYPE;
+  p_total NUMBER;
+
+BEGIN
+  SELECT roll, name, total_marks INTO p_roll, p_name, p_total FROM Stud_Marks WHERE roll = roll_no;
+
+  IF (p_total <= 1500 AND p_total >= 990) THEN
+    INSERT INTO Result VALUES (p_roll, p_name, 'Distinction');
+    DBMS_OUTPUT.PUT_LINE(p_name || ' (roll no. ' || p_roll || ') has been placed in the DISTINCTION category.');
+  ELSIF (p_total BETWEEN 900 AND 989) THEN
+    INSERT INTO Result VALUES (p_roll, p_name, 'First Class');
+    DBMS_OUTPUT.PUT_LINE(p_name || ' (roll no. ' || p_roll || ') has been placed in the FIRST CLASS.');
+  ELSIF (p_total BETWEEN 825 AND 899) THEN
+    INSERT INTO Result VALUES (p_roll, p_name, 'Higher Second Class');
+    DBMS_OUTPUT.PUT_LINE(p_name || ' (roll no. ' || p_roll || ') has been placed in the HIGHER SECOND CLASS.');
+  ELSE
+    INSERT INTO Result VALUES (p_roll, p_name, 'Fail');
+    DBMS_OUTPUT.PUT_LINE(p_name || ' (roll no. ' || p_roll || ') has FAILED.');
+  END IF;
+
+EXCEPTION
+  WHEN NO_DATA_FOUND THEN
+    DBMS_OUTPUT.PUT_LINE('No entry for this roll number in the Stud_Marks database.');
+
+END proc_Grade;
+/
+
+```
+
+## Calling procedure
+
+```sql
+DECLARE
+  roll_no NUMBER;
+BEGIN
+  roll_no := &roll_no; -- replace &roll_no with a number for Live SQL since it does not support user input.
+  proc_Grade(roll_no);
+END;
+/
+
+```