Sample files

Microsoft SQL Server/Chapter 04/Listing 4.009.sql

@@ -1,8 +1,15 @@
+-- Ensure you've run SalesOrdersStructure.sql
+-- and SalesOrdersData.sql in the Sample Databases folder
+-- in order to run this example. 
+
 -- NOTE: Sample table Students does not exist.
 
 CREATE DATABASE StudentsTest;
 GO
 
+USE StudentsTest;
+GO
+
 CREATE TABLE Students (
 	StudentID int PRIMARY KEY NOT NULL,
 	LastName varchar(50),
@@ -11,9 +18,6 @@ CREATE TABLE Students (
 );
 GO
 
-USE StudentsTest;
-GO
-
 SELECT Students.StudentID, Students.LastName, Students.FirstName, 
    YEAR(GETDATE()) - YEAR(Students.BirthDate) - 
     (CASE WHEN MONTH(Students.BirthDate) < MONTH(GETDATE()) 
@@ -24,9 +28,15 @@ SELECT Students.StudentID, Students.LastName, Students.FirstName,
     THEN 1  
     ELSE 0 END) AS Age
   FROM Students;
-
+GO
+
+-- Dummy USE to free up StudentsTest so it can be deleted.
+USE SalesOrdersSample;
+GO
+
 DROP DATABASE StudentsTest;
-
+GO
+
 --Similar code using EmpDOB in the Employees table in SalesOrdersSample
 -- Ensure you've run SalesOrdersStructure.sql
 -- and SalesOrdersData.sql in the Sample Databases folder

MySQL/Chapter 02/Listing 2.028.sql

@@ -1,3 +1,3 @@
-Listing 2.28 shows how to create an index for case-sensitive RDBMS to allow case-insensitive queries.
+-- Listing 2.28 shows how to create an index for case-sensitive RDBMS to allow case-insensitive queries.
 
-Since MySQL Server is case-insensitive, there's no need to have this listing.
+-- Because MySQL Server is case-insensitive, there's no need to have this listing.

MySQL/Chapter 03/Listing 3.005.sql

@@ -1,6 +1,7 @@
 -- Ensure you've run Ch03.20.01Structure.sql
 -- and Ch03.20.01Data.sql in the Sample Databases folder
 -- in order to run this example. 
+-- NOTE: MySQL doesn't allow "Dec" as a column name; Used "Decm" instead.
 
 USE Item19Example;
 

MySQL/Chapter 04/Listing 4.007.sql

@@ -1,6 +1,6 @@
 -- NOTE that these are code snippets that are not executable.
 
---(Replace a code with a word – two examples.)
+-- (Replace a code with a word – two examples.)
 CASE Students.Gender WHEN 'M' THEN 'Male' ELSE 'Female' END
 
 CASE Students.Gender

MySQL/Chapter 04/Listing 4.008.sql

@@ -1,11 +1,11 @@
 -- NOTE that some are code snippets that are not executable.
 
---(Generate a salutation based on gender and marital status.)
+-- (Generate a salutation based on gender and marital status.)
 CASE WHEN Students.Gender = 'M' THEN 'Mr.'
   WHEN Students.MaritalStatus = 'S' THEN 'Ms.'
     ELSE 'Mrs.' END
 
---(Rate sales based by Product on quantity sold.)
+-- (Rate sales based by Product on quantity sold.)
 Use Salesorderssample;
 
 SELECT Products.ProductNumber, Products.ProductName,
@@ -27,7 +27,7 @@ CASE WHEN (SELECT SUM(QuantityOrdered)
   ELSE 'Excellent' END
 FROM Products;
 
---(Calculate raises based on position.)
+-- (Calculate raises based on position.)
 CASE Staff.Title 
 WHEN 'Instructor' 
 THEN ROUND(Salary * 1.05, 0) 

MySQL/Chapter 04/Listing 4.009.sql

@@ -1,15 +1,19 @@
+-- Ensure you've run SalesOrdersStructure.sql
+-- and SalesOrdersData.sql in the Sample Databases folder
+-- in order to run this example. 
+
 -- NOTE: Sample table Students does not exist.
 CREATE DATABASE StudentsTest;
 
+USE StudentsTest;
+
 CREATE TABLE Students (
 	StudentID int PRIMARY KEY NOT NULL,
 	LastName varchar(50),
 	FirstName varchar(50),
 	BirthDate date
 );
 
-USE StudentsTest;
-
 SELECT Students.StudentID, Students.LastName, Students.FirstName, 
    YEAR(CURDATE()) - YEAR(Students.BirthDate) - 
     CASE WHEN MONTH(Students.BirthDate) < MONTH(CURDATE())