MySQL Create Table Exercises: Create a table countries, and make sure that no countries except Italy, India and China will be entered in the table

MySQL Create Tables: Exercise-7 with Solution

7. Write a SQL statement to create a table named countries including columns country_id, country_name and region_id and make sure that no countries except Italy, India and China will be entered in the table.

Sample Solution:

CREATE TABLE IF NOT EXISTS countries ( 
COUNTRY_ID varchar(2),
COUNTRY_NAME varchar(40)
CHECK(COUNTRY_NAME IN('Italy','India','China')) ,
REGION_ID decimal(10,0)
);

Let execute the above code in MySQL 5.6 command prompt

Here is the structure of the table:

mysql> DESC countries;
+--------------+---------------+------+-----+---------+-------+
| Field        | Type          | Null | Key | Default | Extra |
+--------------+---------------+------+-----+---------+-------+
| COUNTRY_ID   | varchar(2)    | YES  |     | NULL    |       |
| COUNTRY_NAME | varchar(40)   | YES  |     | NULL    |       |
| REGION_ID    | decimal(10,0) | YES  |     | NULL    |       |
+--------------+---------------+------+-----+---------+-------+
3 rows in set (0.01 sec)

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Previous: Write a SQL statement to create a table named jobs including columns job_id, job_title, min_salary, max_salary and check whether the max_salary amount exceeding the upper limit 25000.
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