MySQL Alter Table Statement Exercises: Add a column region_id after state_province to the table locations

MySQL Alter Table Statement: Exercise-4 with Solution

Write a SQL statement to add a column region_id after state_province to the table locations.

Here is the structure of the table locations.

mysql> SHOW COLUMNS FROM locations;
+----------------+--------------+------+-----+---------+-------+
| Field          | Type         | Null | Key | Default | Extra |
+----------------+--------------+------+-----+---------+-------+
| LOCATION_ID    | decimal(4,0) | YES  |     | NULL    |       |
| STREET_ADDRESS | varchar(40)  | YES  |     | NULL    |       |
| POSTAL_CODE    | varchar(12)  | YES  |     | NULL    |       |
| CITY           | varchar(30)  | YES  |     | NULL    |       |
| STATE_PROVINCE | varchar(25)  | YES  |     | NULL    |       |
| COUNTRY_ID     | varchar(2)   | YES  |     | NULL    |       |
+----------------+--------------+------+-----+---------+-------+

Code:

ALTER TABLE locations
ADD region_id INT 
AFTER state_province;

Let execute the above code in MySQL 5.6 command prompt

Here is structure of the table locations after alteration.

mysql> SHOW COLUMNS FROM locations;
+----------------+--------------+------+-----+---------+-------+
| Field          | Type         | Null | Key | Default | Extra |
+----------------+--------------+------+-----+---------+-------+
| LOCATION_ID    | decimal(4,0) | YES  |     | NULL    |       |
| STREET_ADDRESS | varchar(40)  | YES  |     | NULL    |       |
| POSTAL_CODE    | varchar(12)  | YES  |     | NULL    |       |
| CITY           | varchar(30)  | YES  |     | NULL    |       |
| STATE_PROVINCE | varchar(25)  | YES  |     | NULL    |       |
| region_id      | int(11)      | YES  |     | NULL    |       |
| COUNTRY_ID     | varchar(2)   | YES  |     | NULL    |       |
+----------------+--------------+------+-----+---------+-------+

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