Finished

answers/exercise1.sql

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+CREATE SCHEMA myNewDB;
+
+or 
+
+CREATE DATABASE myNewDB;

answers/exercise10.sql

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+SELECT * FROM Students
+WHERE City='Philadelphia' OR City='Trenton'

answers/exercise11.sql

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+SELECT * FROM Students ORDER BY City;

answers/exercise12.sql

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+SELECT * FROM Students ORDER BY City DESC;

answers/exercise13.sql

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+SELECT * FROM Sctudents ORDER BY Country, City;

answers/exercise14.sql

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+SELECT * FROM Students WHERE PostalCode IS NULL;

answers/exercise15.sql

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+SELECT * FROM Students WHERE PostalCode IS NOT NULL;

answers/exercise16.sql

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+UPDATE Student SET City = 'Edinburgh';

answers/exercise17.sql

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+UPDATE Student SET City = 'Edinburgh' WHERE Country = 'Scotland';

answers/exercise18.sql

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+UPDATE Student SET City = "Edinburgh", Country = "Scotland" WHERE  Id = 35;

answers/exercise19.sql

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+DELETE FROM Students WHERE Country = "Scotland";

answers/exercise2.sql

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+DROP DATABASE myNewDB;

answers/exercise20.sql

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+DELETE FROM Students;

answers/exercise3.sql

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+CREATE TABLE Users 
+(
+	UserID INTEGER PRIMARY KEY NOT NULL AUTO_INCREMENT,
+    LastName VARCHAR (255),
+    FirstName VARCHAR (255),
+    Address VARCHAR (255),
+    City VARCHAR (255)
+);
+

answers/exercise4.sql

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+DROP TABLE Users;

answers/exercise5.sql

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+TRUNCATE TABLE Users;

answers/exercise6.sql

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+ALTER TABLE Users
+ADD Birthdays DATE;

answers/exercise7.sql

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+ALTER TABLE Users
+DROP COLUMN Birthdays;

answers/exercise8.sql

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+INSERT INTO Students (StudentName, Address, City, PostalCode, Country)
+VALUES ("Jane Doe", "57 Union St", "Glasgow", "G13RB", "Scotland");

answers/exercise9.sql

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+SELECT * FROM Students
+WHERE NOT City='Philadelphia';