mysql> create database if not exists myTestDB;

Query OK, 1 row affected (0.00 sec)

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| mytestdb           |

| performance_schema |

| sys                |

+--------------------+

5 rows in set (0.01 sec)

mysql> drop database if exists mytestdb;

Query OK, 0 rows affected (0.00 sec)

mysql> create database if not exists mytestdb;

Query OK, 1 row affected (0.00 sec)

mysql> use mytestdb;

Database changed