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SQL Constraints

Introduction
Final Quiz
3. Question 2
Summary

Instruction

Perfect! How about this one?

Exercise

Create a table named country based on the description below:

Each country has:

  • A unique integer id column which is the primary key.
  • A unique name of up to 128 characters.
  • A column named continent_code that's exactly 2 characters long. Its default value should be 'NA', which stands for unknown.
  • A population column (expressed in millions) which is a decimal of up to 999.99, with two digits after the decimal sign. Make sure its value is more than zero.