Create a duplicate of the MySQL 'countries' table named 'country_new' with all structure and data

MySQL insert into Statement: Exercise-3 with Solution

3. Write a MySQL query to create duplicate of countries table named country_new with all structure and data.

Here is the structure of the table "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    |       |
+--------------+---------------+------+-----+---------+-------+	

Sample Solution:

-- Creating a new table 'country_new' if it doesn't already exist
CREATE TABLE IF NOT EXISTS country_new
-- Copying all records from the 'countries' table into the new table
AS SELECT * FROM countries;

Let execute the above code in MySQL command prompt.

Here is the structure of the table:

mysql> SHOW COLUMNS FROM country_new;
+--------------+---------------+------+-----+---------+-------+
| Field        | Type          | Null | Key | Default | Extra |
+--------------+---------------+------+-----+---------+-------+
| COUNTRY_ID   | varchar(8)    | YES  |     | NULL    |       |
| COUNTRY_NAME | varchar(40)   | YES  |     | NULL    |       |
| REGION_ID    | decimal(10,0) | YES  |     | NULL    |       |
+--------------+---------------+------+-----+---------+-------+
3 rows in set (0.00 sec)

mysql> SELECT * FROM country_new;
+------------+--------------+-----------+
| COUNTRY_ID | COUNTRY_NAME | REGION_ID |
+------------+--------------+-----------+
| C1         | India        |      1001 |
+------------+--------------+-----------+
1 row in set (0.00 sec)

Explanation:

The above MySQL code creates a new table named 'country_new' if it doesn't already exist and copies all records from the existing 'countries' table into the new table using a SELECT statement.

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