SQL 

--Create table STUDENT with PRIMARY KEY as USN

CREATE TABLE STUDENT(
USN VARCHAR(10) PRIMARY KEY,
SNAME VARCHAR(25),
ADDRESS VARCHAR(25),
PHONE INTEGER,
GENDER CHAR(1));

DESC STUDENT;

--Inserting records into STUDENT table

INSERT INTO STUDENT VALUES ('1BI13CS020','ANAND','BELAGAVI', 1233423,'M');
INSERT INTO STUDENT VALUES ('1BI13CS062','BABIITHA','BENGALURU',43123,'F');
INSERT INTO STUDENT VALUES ('1BI15CS101','CHETHAN','BENGALURU', 534234,'M');
INSERT INTO STUDENT VALUES ('1BI13CS066','DIVYA','MANGALURU',534432,'F');
INSERT INTO STUDENT VALUES ('1BI14CS010','EESHA','BENGALURU', 345456,'F');
INSERT INTO STUDENT VALUES ('1BI14CS032','GANESH','BENGALURU',574532,'M');
INSERT INTO STUDENT VALUES ('1BI14CS025','HARISH','BENGALURU', 235464,'M');
INSERT INTO STUDENT VALUES ('1BI15CS011','ISHA','TUMKUR', 764343,'F');
INSERT INTO STUDENT VALUES ('1BI15CS029','JOEY','DAVANGERE', 235653,'M');


SELECT * FROM STUDENT;

------------------------------------

SQL 


--Create table SEMSEC with PRIMARY KEY as SSID

CREATE TABLE SEMSEC(
SSID VARCHAR(5) PRIMARY KEY,
SEM INTEGER,
SEC CHAR(1));

DESC SEMSEC;

--Inserting records into SEMSEC table

INSERT INTO SEMSEC VALUES ('CSE8A', 8,'A');
INSERT INTO SEMSEC VALUES ('CSE8B', 8,'B');
INSERT INTO SEMSEC VALUES ('CSE8C', 8,'C');
INSERT INTO SEMSEC VALUES ('CSE7A', 7,'A');
INSERT INTO SEMSEC VALUES ('CSE7B', 7,'B');
INSERT INTO SEMSEC VALUES ('CSE7C', 7,'C');
INSERT INTO SEMSEC VALUES ('CSE6A', 6,'A');
INSERT INTO SEMSEC VALUES ('CSE6B', 6,'B');
INSERT INTO SEMSEC VALUES ('CSE6C', 6,'C');
INSERT INTO SEMSEC VALUES ('CSE5A', 5,'A');

SELECT * FROM SEMSEC;

---------------------------------------

SQL 


--Create table CLASS with PRIMARY KEY as USN and FOREIGN KEY USN, SSID

CREATE TABLE CLASS(
USN VARCHAR(10) PRIMARY KEY,
SSID VARCHAR(5),
FOREIGN KEY(USN) REFERENCES STUDENT(USN),
FOREIGN KEY(SSID) REFERENCES SEMSEC(SSID));

DESC CLASS;

--Inserting records into CLASS table

INSERT INTO CLASS VALUES ('1BI13CS020','CSE8A');
INSERT INTO CLASS VALUES ('1BI13CS062','CSE8A');
INSERT INTO CLASS VALUES ('1BI13CS066','CSE8B');
INSERT INTO CLASS VALUES ('1BI15CS101','CSE8C');
INSERT INTO CLASS VALUES ('1BI14CS010','CSE7A');
INSERT INTO CLASS VALUES ('1BI14CS025','CSE7A');
INSERT INTO CLASS VALUES ('1BI14CS032','CSE7A');
INSERT INTO CLASS VALUES ('1BI15CS011','CSE4A');
INSERT INTO CLASS VALUES ('1BI15CS029','CSE4A');
INSERT INTO CLASS VALUES ('1BI15CS045','CSE4B');
INSERT INTO CLASS VALUES ('1BI15CS091','CSE4C');
INSERT INTO CLASS VALUES ('1BI16CS045','CSE3A');
INSERT INTO CLASS VALUES ('1BI16CS088','CSE3B');
INSERT INTO CLASS VALUES ('1BI16CS122','CSE3C');

SELECT * FROM CLASS;

-------------------------------------

SQL 


--Create table SUBJECT with PRIMARY KEY as SUBCODE

CREATE TABLE SUBJECT(
SUBCODE VARCHAR(8) PRIMARY KEY,
TITLE VARCHAR(20),
SEM INTEGER,
CREDITS INTEGER);

DESC SUBJECT;

--Inserting records into SUBJECT table

INSERT INTO SUBJECT VALUES ('10CS81','ACA', 8, 4);
INSERT INTO SUBJECT VALUES ('10CS82','SSM', 8, 4);
INSERT INTO SUBJECT VALUES ('10CS83','NM', 8, 4);
INSERT INTO SUBJECT VALUES ('10CS84','CC', 8, 4);
INSERT INTO SUBJECT VALUES ('10CS85','PW', 8, 4);
INSERT INTO SUBJECT VALUES ('10CS71','OOAD', 7, 4);
INSERT INTO SUBJECT VALUES ('10CS72','ECS', 7, 4);
INSERT INTO SUBJECT VALUES ('10CS73','PTW', 7, 4);
INSERT INTO SUBJECT VALUES ('10CS74','DWDM', 7, 4);
INSERT INTO SUBJECT VALUES ('10CS75','JAVA', 7, 4);
INSERT INTO SUBJECT VALUES ('10CS76','SAN', 7, 4);
INSERT INTO SUBJECT VALUES ('15CS51','ME', 5, 4);
INSERT INTO SUBJECT VALUES ('15CS52','CN', 5, 4);
INSERT INTO SUBJECT VALUES ('15CS53','DBMS', 5, 4);
INSERT INTO SUBJECT VALUES ('15CS54','ATC', 5, 4);

SQL 


--Create table IAMARKS with PRIMARY KEY as SUBCODE,USN,SSID 
and FOREIGN KEY SUBCODE, SSID--

CREATE TABLE IAMARKS(
USN VARCHAR(10),
SUBCODE VARCHAR(8),
SSID VARCHAR(5),
TEST1 INTEGER,
TEST2 INTEGER,
TEST3 INTEGER,
FINALIA INTEGER,
PRIMARY KEY(SUBCODE,USN,SSID),
FOREIGN KEY(USN) REFERENCES STUDENT(USN),
FOREIGN KEY(SUBCODE) REFERENCES SUBJECT(SUBCODE),
FOREIGN KEY(SSID) REFERENCES SEMSEC(SSID));

DESC IAMARKS;

--Inserting records into IAMARKS table

INSERT INTO IAMARKS (USN, SUBCODE, SSID, TEST1, TEST2, TEST3) VALUES ('1BI15CS101','10CS81','CSE8C', 15, 16, 18);
INSERT INTO IAMARKS (USN, SUBCODE, SSID, TEST1, TEST2, TEST3) VALUES ('1BI15CS101','10CS82','CSE8C', 12, 19, 14);
INSERT INTO IAMARKS (USN, SUBCODE, SSID, TEST1, TEST2, TEST3) VALUES ('1BI15CS101','10CS83','CSE8C', 19, 15, 20);
INSERT INTO IAMARKS (USN, SUBCODE, SSID, TEST1, TEST2, TEST3) VALUES ('1BI15CS101','10CS84','CSE8C', 20, 16, 19);
INSERT INTO IAMARKS (USN, SUBCODE, SSID, TEST1, TEST2, TEST3) VALUES ('1BI15CS101','10CS85','CSE8C', 15, 15, 12);

SELECT * FROM IAMARKS;

SQL 



--List all the student details studying in fourth semester ‘C’ section.

SELECT S.*, SS.SEM, SS.SEC
FROM STUDENT S, SEMSEC SS, CLASS C
WHERE S.USN = C.USN AND
SS.SSID = C.SSID AND
SS.SEM = 4 AND SS.SEC='C';

----------------------------------------

--Compute the total number of male and female students in each semester 
and in each section.--

SELECT SS.SEM, SS.SEC, S.GENDER, COUNT(S.GENDER) AS COUNT
FROM STUDENT S, SEMSEC SS, CLASS C
WHERE S.USN = C.USN AND
SS.SSID = C.SSID
GROUP BY SS.SEM, SS.SEC, S.GENDER
ORDER BY SEM;

----------------------------------------

--Create a view of Test1 marks of student USN ‘1BI15CS101’ 
in all Courses.--

CREATE VIEW STUDENT_TEST1_MARKS_V
AS
SELECT TEST1, SUBCODE
FROM IAMARKS
WHERE USN = '1BI15CS101';

SELECT * FROM STUDENT_TEST1_MARKS_V;

----------------------------------------

--Calculate the FinalIA (average of best two test marks) and 
update the corresponding table for all students.--

DELIMITER //
CREATE PROCEDURE AVG_MARKS()
BEGIN
DECLARE C_A INTEGER;
DECLARE C_B INTEGER;
DECLARE C_C INTEGER;
DECLARE C_SUM INTEGER;
DECLARE C_AVG INTEGER;
DECLARE C_USN VARCHAR(10);
DECLARE C_SUBCODE VARCHAR(8);
DECLARE C_SSID VARCHAR(5);

DECLARE C_IAMARKS CURSOR FOR
SELECT GREATEST(TEST1,TEST2) AS A, GREATEST(TEST1,TEST3) AS B, GREATEST(TEST3,TEST2) AS C, USN, SUBCODE, SSID
FROM IAMARKS
WHERE FINALIA IS NULL
FOR UPDATE;

OPEN C_IAMARKS;
LOOP

FETCH C_IAMARKS INTO C_A, C_B, C_C, C_USN, C_SUBCODE, C_SSID;

IF (C_A != C_B) THEN
	SET C_SUM=C_A+C_B;
ELSE
	SET C_SUM=C_A+C_C;
END IF;

SET C_AVG=C_SUM/2;

UPDATE IAMARKS SET FINALIA = C_AVG 
WHERE USN = C_USN AND SUBCODE = C_SUBCODE AND SSID = C_SSID;

END LOOP;
CLOSE C_IAMARKS;
END;
//

CALL AVG_MARKS();

SELECT * FROM IAMARKS;

--------------------------------------------

-- Categorize students based on the following criterion:
-- If FinalIA = 17 to 20 then CAT = ‘Outstanding’
-- If FinalIA = 12 to 16 then CAT = ‘Average’
-- If FinalIA< 12 then CAT = ‘Weak’
-- Give these details only for 8th semester A, B, and C section students.

SELECT S.USN,S.SNAME,S.ADDRESS,S.PHONE,S.GENDER, IA.SUBCODE,
(CASE
WHEN IA.FINALIA BETWEEN 17 AND 20 THEN 'OUTSTANDING'
WHEN IA.FINALIA BETWEEN 12 AND 16 THEN 'AVERAGE'
ELSE 'WEAK'
END) AS CAT
FROM STUDENT S, SEMSEC SS, IAMARKS IA, SUBJECT SUB
WHERE S.USN = IA.USN AND
SS.SSID = IA.SSID AND
SUB.SUBCODE = IA.SUBCODE AND
SUB.SEM = 8;