Merge pull request #20 from realpython/update-chapter-15-exercises

Update Ch15 exercises

Author: dbader

ch15-sql-database-connections/1-use-sqlite.py

@@ -8,26 +8,26 @@
     c = connection.cursor()
 
     # Exercise 1
-    # Create a "Roster" table with Name, Species and IQ fields
-    c.execute("CREATE TABLE Roster(Name TEXT, Species TEXT, IQ INT)")
+    # Create a "Roster" table with Name, Species and Age fields
+    c.execute("CREATE TABLE Roster(Name TEXT, Species TEXT, Age INT)")
 
     # Exercise 2
     # Add some data into the database
     roster_data = (
-        ("Jean-Baptiste Zorg", "Human", 122),
-        ("Korben Dallas", "Meat Popsicle", 100),
-        ("Ak'not", "Mangalore", -5),
+        ("Benjamin Sisko", "Human", 40),
+        ("Jadzia Dax", "Trill", 300),
+        ("Kira Nerys", "Bajoran", 29),
     )
     c.executemany("INSERT INTO Roster VALUES(?, ?, ?)", roster_data)
 
     # Exercise 3
-    # Update the Species of Korben Dallas to "Human"
+    # Update the Name of Jadzia Dax to "Ezri Dax"
     c.execute(
-        "UPDATE Roster SET Species=? WHERE Name=?", ("Human", "Korben Dallas")
+        "UPDATE Roster SET Name=? WHERE Name=?", ("Ezri Dax", "Jadzia Dax")
     )
 
     # Exercise 4
-    # Display the names and IQs of everyone classified as Human
-    c.execute("SELECT Name, IQ FROM Roster WHERE Species = 'Human'")
+    # Display the names and ages of everyone classified as Bajoran
+    c.execute("SELECT Name, Age FROM Roster WHERE Species = 'Bajoran'")
     for row in c.fetchall():
         print(row)