Project 2: - Analysis of Alumni Career Choices in College A and College B

-- The project aims to gain insights into the career paths chosen by alumni, identify any trends or patterns, and calculate the percentage of alumni pursuing higher studies, self-employment, and service/employment. The dataset will be analyzed using SQL queries to extract relevant information and perform various SQL operations

-- Q1. Create a new schema as alumni
create schema alumni;

-- Q2. Import all .csv files into MySQL
use alumni;
select * from college_a_hs;
select * from college_a_se;
select * from college_a_sj;
select * from college_b_hs;
select * from college_b_se;

-- Q3. Run the SQL command to see the structure of six tables
desc college_a_hs;
desc college_a_se;
desc college_a_sj;
desc college_b_hs;
desc college_b_se;

-- Q4. Display the first 1000 rows of tables (College_A_HS, College_A_SE, College_A_SJ, College_B_HS, College_B_SE, College_B_SJ) with Python.
-- It Is Perform On Python (Jupyter Notebook) & .py file is attached here.

-- Q5. Import the first 1500 rows of tables (College_A_HS, College_A_SE, College_A_SJ, College_B_HS, College_B_SE, College_B_SJ) into MS Excel.
-- It Is Perform On MS Excel & File is attached here.

-- Q6. Perform data cleaning on table College_A_HS and store cleaned data in view College_A_HS_V, Remove null values.

CREATE OR REPLACE VIEW college_a_hs_V AS (SELECT * FROM college_a_hs WHERE RollNo IS NOT NULL AND LastUpdate IS NOT NULL AND Name IS NOT NULL AND FatherName IS NOT NULL AND MotherName IS NOT NULL
AND Batch IS NOT NULL AND

Degree IS NOT NULL AND PresentStatus IS NOT NULL AND HSDegree IS NOT NULL AND EntranceExam IS NOT NULL AND Institute IS NOT NULL AND Location IS NOT NULL);
SELECT * FROM college_a_hs_V;

-- Q7. Perform data cleaning on table College_A_SE and store cleaned data in view College_A_SE_V, Remove null values.
CREATE OR REPLACE VIEW College_a_se_V AS (SELECT * FROM college_a_se WHERE RollNo IS NOT NULL AND LastUpdate IS NOT NULL AND Name IS NOT NULL AND FatherName IS NOT NULL AND MotherName IS NOT NULL
AND Batch IS NOT NULL AND
Degree IS NOT NULL AND PresentStatus IS NOT NULL AND Organization IS NOT NULL AND Location IS NOT NULL);
SELECT * FROM College_a_se_V;

-- Q8. Perform data cleaning on table College_A_SJ and store cleaned data in view College_A_SJ_V, Remove null values.

CREATE OR replace view College_a_sj_V AS (SELECT * FROM college_a_sj WHERE RollNo IS NOT NULL AND LastUpdate IS NOT NULL AND Name IS NOT NULL AND FatherName IS NOT NULL AND MotherName IS NOT NULL
AND Batch IS NOT NULL AND
Degree IS NOT NULL AND PresentStatus IS NOT NULL AND Organization IS NOT NULL AND Designation IS NOT NULL AND Location IS NOT NULL);
SELECT * FROM College_a_sj_V;

-- Q9. Perform data cleaning on table College_B_HS and store cleaned data in view College_B_HS_V, Remove null values.

CREATE or replace VIEW college_b_hs_V AS (SELECT * FROM college_b_hs WHERE RollNo IS NOT NULL AND LastUpdate IS NOT NULL AND Name IS NOT NULL AND FatherName IS NOT NULL AND MotherName IS NOT NULL
AND Branch IS NOT NULL AND Batch IS NOT NULL AND
Degree IS NOT NULL AND PresentStatus IS NOT NULL AND HSDegree IS NOT NULL AND EntranceExam IS NOT NULL AND Institute IS NOT NULL AND Location IS NOT NULL);
SELECT * FROM college_b_hs_V;

-- Q10. Perform data cleaning on table College_B_SE and store cleaned data in view College_B_SE_V, Remove null values.

CREATE OR REPLACE VIEW college_b_se_V AS (SELECT * FROM college_b_se WHERE RollNo IS NOT NULL AND LastUpdate IS NOT NULL AND Name IS NOT NULL AND FatherName IS NOT NULL AND MotherName IS NOT NULL
AND Branch IS NOT NULL AND Batch IS NOT NULL AND
Degree IS NOT NULL AND PresentStatus IS NOT NULL AND Organization IS NOT NULL AND Location IS NOT NULL);
SELECT * FROM college_b_se_V;

-- Q11. Perform data cleaning on table College_B_SJ and store cleaned data in view College_B_SJ_V, Remove null values.

CREATE OR REPLACE VIEW college_b_sj_V AS (SELECT * FROM college_b_sj WHERE RollNo IS NOT NULL AND LastUpdate IS NOT NULL AND Name IS NOT NULL AND FatherName IS NOT NULL AND MotherName IS NOT NULL
AND Branch IS NOT NULL AND Batch IS NOT NULL AND
Degree IS NOT NULL AND PresentStatus IS NOT NULL AND Organization IS NOT NULL AND Designation IS NOT NULL AND Location IS NOT NULL);
SELECT * FROM college_b_sj_V;

-- Q12. Make procedure to use string function/s for converting record of Name, FatherName, MotherName into lower case for views (College_A_HS_V, College_A_SE_V, College_A_SJ_V, College_B_HS_V, College_B_SE_V, College_B_SJ_V)

SELECT LOWER(Name),LOWER(FatherName),LOWER(MotherName) FROM College_A_HS_V;
SELECT LOWER(Name),LOWER(FatherName),LOWER(MotherName) FROM College_A_Se_V;
SELECT LOWER(Name),LOWER(FatherName),LOWER(MotherName) FROM College_A_Sj_V;
SELECT LOWER(Name),LOWER(FatherName),LOWER(MotherName) FROM College_B_HS_V;
SELECT LOWER(Name),LOWER(FatherName),LOWER(MotherName) FROM College_B_Se_V;
SELECT LOWER(Name),LOWER(FatherName),LOWER(MotherName) FROM College_B_Sj_V;

-- Q13. Import the created views (College_A_HS_V, College_A_SE_V, College_A_SJ_V, College_B_HS_V, College_B_SE_V, College_B_SJ_V) into MS Excel and make pivot chart for the location of Alumni.
-- It Is Perform On MS Excel & File is attached here.

-- Q14.Write a query to create procedure get_name_collegeA using the cursor to fetch the names of all students from college A.
DROP PROCEDURE get_name_collegeA
DELIMITER $$
CREATE PROCEDURE get_name_collegeA
(
INOUT name1 TEXT(40000)
)
BEGIN
DECLARE na INT DEFAULT 0;
DECLARE namelist VARCHAR(16000) DEFAULT "";

DECLARE namedetail
CURSOR FOR
SELECT Name FROM college_a_hs UNION SELECT Name FROM college_a_se UNION SELECT Name FROM college_a_sj;

DECLARE CONTINUE HANDLER
FOR NOT FOUND SET na =1;

OPEN namedetail;

getame :
LOOP
FETCH FROM namedetail INTO namelist;
IF na = 1 THEN
LEAVE getame;
END IF;
SET name1 = CONCAT(namelist,";",name1);

END LOOP getame;
CLOSE namedetail;
END $$
DELIMITER ;

SET @Name = "";
CALL get_name_collegeA(@Name);
SELECT @Name Name;

-- Q.15 Write a query to create procedure get_name_collegeB using the cursor to fetch names of all students from college B.
DROP PROCEDURE get_name_collegeB
DELIMITER $$
CREATE PROCEDURE get_name_collegeB
(
INOUT name1 TEXT(40000)
)
BEGIN
DECLARE na INT DEFAULT 0;
DECLARE namelist VARCHAR(16000) DEFAULT "";

DECLARE namedetail
CURSOR FOR
SELECT Name FROM college_b_hs UNION SELECT Name FROM college_b_se UNION SELECT Name FROM college_b_sj;

DECLARE CONTINUE HANDLER
FOR NOT FOUND SET na =1;

OPEN namedetail;

getame :
LOOP
FETCH FROM namedetail INTO namelist;
IF na = 1 THEN
LEAVE getame;
END IF;
SET name1 = CONCAT(namelist,";",name1);

END LOOP getame;
CLOSE namedetail;
END $$
DELIMITER ;

SET @Name = "";
CALL get_name_collegeB(@Name);
SELECT @Name Name;

-- Q16.Calculate the percentage of career choice of College A and College B Alumni (w.r.t Higher Studies, Self Employed and Service/Job)

SELECT "Higher Studies" Present_status,(COUNT(college_a_hs.RollNo) /(college_a_hs.RollNo))*100 College_A_Persentage,(COUNT(college_b_hs.RollNo)/(college_b_hs.RollNo))*100 College_B_Persentage FROM college_a_hs CROSS JOIN college_b_hs UNION
SELECT "Self Empolyment" Present_status,(COUNT(college_a_se.RollNo) /(college_a_se.RollNo))*100 College_A_Persentage,(COUNT(college_b_se.RollNo)/(college_b_se.RollNo))*100 College_B_Persentage FROM college_a_se CROSS JOIN college_b_se UNION
SELECT "Service Job" Present_status,(COUNT(college_a_sj.RollNo) /(college_a_sj.RollNo))*100 College_A_Persentage,(COUNT(college_b_sj.RollNo)/(college_b_sj.RollNo))*100 College_B_Persentage FROM college_a_sj CROSS JOIN college_b_sj;