Done SQL Lab

answers/exercise1.sql

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+CREATE TABLE Enrollment (
+ FirstName VARCHAR(255),
+ LastName VARCHAR(255),
+ Adress VARCHAR(255),
+ City VARCHAR(255),
+ StudentID VARCHAR(100),
+ Hobby VARCHAR (255),
+ Skills VARCHAR (255));
+
+INSERT INTO Enrollment (
+FirstName,
+LastName,
+Adress,
+City,
+StudentID,
+Hobby,
+Skills)
+VALUES (
+'John',
+'Song',
+'76 gggg St',
+'Philly', '3',
+'Games', 'Coding');
+
+SELECT * FROM Enrollment
+LEFT JOIN Students ON Enrollment.StudentID = Students.StudentID;
+

answers/exercise2.sql

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+SELECT * FROM Enrollment
+INNER JOIN Students
+ON Enrollment.StudentID = Students.StudentID;

answers/exercise3.sql

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+SELECT * FROM Enrollment
+RIGHT JOIN Students
+ON Enrollment.StudentID = Students.StudentID;

answers/exercise4.sql

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+SELECT COUNT(*), Country
+FROM Students 
+GROUP BY Country;

answers/exercise5.sql

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+SELECT COUNT(*), Country FROM Students 
+GROUP BY Country
+ORDER BY COUNT(*) DESC;

answers/exercise6.sql

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+SELECT Country, COUNT(*) FROM Students 
+GROUP BY Country
+HAVING COUNT(*) > 10
+ORDER BY COUNT(*);