its lit

SQL.BuildAndDestroy/answers/exercise1.sql

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+CREATE DATABASE myNewDB;
+SHOW DATABASES;

SQL.BuildAndDestroy/answers/exercise10.sql

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+SELECT * FROM Students WHERE City IN ('Philadelphia' , 'Trenton');

SQL.BuildAndDestroy/answers/exercise11.sql

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+SELECT * FROM Students ORDER BY City;

SQL.BuildAndDestroy/answers/exercise12.sql

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+SELECT * FROM Students ORDER BY City DESC;

SQL.BuildAndDestroy/answers/exercise13.sql

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+SELECT * FROM Students ORDER BY Country, City;

SQL.BuildAndDestroy/answers/exercise14.sql

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+SELECT * FROM Students WHERE PostalCode IS NULL;

SQL.BuildAndDestroy/answers/exercise15.sql

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+SELECT * FROM Students WHERE PostalCode IS NOT NULL;

SQL.BuildAndDestroy/answers/exercise16.sql

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+UPDATE Students SET City = 'Philadelphia';
+SET SQL_SAFE_UPDATES = 0;
+SELECT * FROM Students;

SQL.BuildAndDestroy/answers/exercise17.sql

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+UPDATE Students SET City = 'Edinburgh' WHERE Country = 'Scotland';
+SELECT * FROM Students;

SQL.BuildAndDestroy/answers/exercise18.sql

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+ALTER TABLE Students ADD id INT;
+SELECT * FROM Students;
+UPDATE Students SET id = 35;
+UPDATE Students SET City = 'Edinburgh' AND Country = 'Scotland' WHERE id = 35;

SQL.BuildAndDestroy/answers/exercise19.sql

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+DELETE FROM Students WHERE Country = 'Scotland';

SQL.BuildAndDestroy/answers/exercise2.sql

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+DROP DATABASE myNewDB;

SQL.BuildAndDestroy/answers/exercise20.sql

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+DELETE FROM Students;
+SELECT * FROM Students;

SQL.BuildAndDestroy/answers/exercise3.sql

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+CREATE DATABASE myNewDB;
+USE myNewDB;
+CREATE TABLE Users(
+UserID int, LastName VARCHAR(255),
+FirstName VARCHAR(255), Address VARCHAR(255),
+City VARCHAR(255)
+);
+DESCRIBE Users;

SQL.BuildAndDestroy/answers/exercise4.sql

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+DROP TABLE Users;

SQL.BuildAndDestroy/answers/exercise5.sql

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+TRUNCATE TABLE Users;

SQL.BuildAndDestroy/answers/exercise6.sql

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+ALTER TABLE Users ADD Birthday DATE;
+DESCRIBE Users;

SQL.BuildAndDestroy/answers/exercise7.sql

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+ALTER TABLE Users DROP Birthday;
+DESCRIBE Users;

SQL.BuildAndDestroy/answers/exercise8.sql

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+CREATE TABLE Students( 
+StudentName VARCHAR(255),
+Address VARCHAR(255), 
+City VARCHAR(255), 
+PostalCode VARCHAR(255),
+Country VARCHAR(255));
+DESCRIBE Students;
+
+INSERT INTO Students(
+StudentName,
+Address,
+City,
+PostalCode,
+Country)
+VALUES(
+'New Person',
+'23 Mindyabiz Ave',
+'Bear',
+NULL,
+'USA');
+SELECT * FROM Students;

SQL.BuildAndDestroy/answers/exercise9.sql

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