answers.md

Chapter 1 Questions and Answers

1. Entering the code below returns an error. Try adding one character to make it return {true}.

Answer: change with my_name = 'Timothy' to with my_name := 'Timothy'. This will assign the string 'Timothy' to my_name (instead of trying to compare 'Timothy' to my_name which doesn't exist). Then it will compare it to 'Benjamin' and return {true} because they are not equal.

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2. Try inserting a City called Constantinople, but now known as İstanbul.

insert City {
  name := 'Constantinople',
  modern_name := 'İstanbul' # Comma after here is fine if you want
};

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3. Try displaying all the names of the cities in the database.

This is all you need: select City.name;

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4. Try selecting all the City types along with their name and modern_name properties, but change .name to say old_name and change modern_name to say name_now.

select City {
  old_name := .name,
  name_now := .modern_name,
};

Of course, this will not change the name of the properties. old_name and name_now only show up in this one query.

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5. Will typing SelecT City; produce an error?

No, because keywords are case insensitive.