Sample Files Chapter 2

TexanInParis · Jul 13, 2016 · 75f2932 · 75f2932
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Showing 5 changed files with 14 additions and 6 deletions.
diff --git a/IBM DB2/Chapter 02/Listing 2.029.sql b/IBM DB2/Chapter 02/Listing 2.029.sql
@@ -5,6 +5,8 @@ SET SCHEMA SalesOrdersSample;
 
 CREATE FUNCTION CalculateAge(Date_of_Birth DATE) 
 RETURNS int
-RETURN TRUNC((CURRENT_DATE - Date_of_Birth) / 365);
+RETURN TRUNC((DAYS(CURRENT_DATE) - DAYS(Date_of_Birth)) / 365, 0);
 
-DROP FUNCTION CalculateAge;
+-- Execute the following only if you do not intend
+--  to run Listing 2.030.
+-- DROP FUNCTION CalculateAge;
diff --git a/Microsoft SQL Server/Chapter 02/Listing 2.029.sql b/Microsoft SQL Server/Chapter 02/Listing 2.029.sql
@@ -13,5 +13,6 @@ BEGIN
   RETURN DATEDIFF(DAY, @Date_of_Birth, CAST(GETDATE() AS date)) / 365;
 END;
 
--- Run the following if you do not wish to keep the function in the database.
+-- Execute the following only if you do not intend
+--  to run Listing 2.030.
 -- DROP FUNCTION CalculateAge;
diff --git a/MySQL/Chapter 02/Listing 2.029.sql b/MySQL/Chapter 02/Listing 2.029.sql
@@ -11,5 +11,6 @@ CREATE FUNCTION CalculateAge(Date_of_Birth date)
 RETURNS int
 RETURN (DATEDIFF(CURRENT_DATE, Date_of_Birth) / 365);
 
--- Run the following if you do not wish to keep the function in the database.
+-- Execute the following only if you do not intend
+--  to run Listing 2.030.
 -- DROP FUNCTION CalculateAge;
diff --git a/Oracle/Chapter 02/Listing 2.029.sql b/Oracle/Chapter 02/Listing 2.029.sql
@@ -9,4 +9,6 @@ BEGIN
 	RETURN(TRUNC((SYSDATE - Date_of_Birth) / 365));	
 END;
 
-DROP FUNCTION CalculateAge;
+-- Execute the following only if you do not intend
+--  to run Listing 2.030.
+-- DROP FUNCTION CalculateAge;
diff --git a/PostgreSQL/Chapter 02/Listing 2.029.sql b/PostgreSQL/Chapter 02/Listing 2.029.sql
@@ -12,4 +12,6 @@ BEGIN
 END;
 $BODY$;
 
-DROP FUNCTION CalculateAge(Date_of_Birth DATE);
+-- Execute the following only if you do not intend
+--  to run Listing 2.030.
+-- DROP FUNCTION CalculateAge(Date_of_Birth DATE);