mysql duplicate database code example

Example 1: mariadb clone database to another name

// if you didnt create the target db, do it:
mysql -u your_user -p

> CREATE DATABASE the_db_cloned_name;
> SHOW DATABASES

// then check if it is created and so you're ready to proceed
mysqldump -u your_user -p the_db_name > /directory/file_name.sql
mysql -u your_user -p the_db_cloned_name < /directory/file_name.sql

Example 2: select where duplicate mysql

SELECT 
    col1, COUNT(col1),
    col2, COUNT(col2)
FROM
    table_name
GROUP BY 
    col1, 
    col2
HAVING 
       (COUNT(col1) > 1) AND 
       (COUNT(col2) > 1);