Database config file

Default, is mysql can change it
'default' => [
'driver' => 'mysql',
'url' => env('DATABASE_URL'),
'host' => env('DB_HOST', '127.0.0.1'),
'port' => env('DB_PORT', '3306'),
'database' => env('DB_DATABASE', 'ions'),
'username' => env('DB_USERNAME', 'root'),
'password' => env('DB_PASSWORD', 'mysql'),
'unix_socket' => env('DB_SOCKET', ''),
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
'prefix' => '',
'prefix_indexes' => true,
'strict' => true,
'engine' => null,
'dump' => ['dump_binary_path' => '/Applications/MAMP/Library/bin/'],
'options' => extension_loaded('pdo_mysql') ? array_filter([
PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
]) : [],
]
Postgrel 
'pgsql' => [
'driver' => 'pgsql',
'url' => env('DATABASE_PG_URL'),
'host' => env('DB_HOST_PG', 'localhost'),
'port' => env('DB_PORT_PG', '5432'),
'database' => env('DB_DATABASE_PG', 'ion_8'),
'username' => env('DB_USERNAME_PG', 'postgres'),
'password' => env('DB_PASSWORD_PG', 'mysql'),
'charset' => 'utf8',
'prefix' => '',
'prefix_indexes' => true,
'schema' => 'public',
'sslmode' => 'prefer',
]
sql lite
'sqlite' => [
'driver' => 'sqlite',
'url' => env('DATABASE_URL'),
'database' => env('DB_DATABASE', database_path('database.sqlite')),
'prefix' => '',
'foreign_key_constraints' => env('DB_FOREIGN_KEYS', true),
],
Sql server
'sqlsrv' => [
'driver' => 'sqlsrv',
'url' => env('DATABASE_URL'),
'host' => env('DB_HOST', 'localhost'),
'port' => env('DB_PORT', '1433'),
'database' => env('DB_DATABASE', 'forge'),
'username' => env('DB_USERNAME', 'forge'),
'password' => env('DB_PASSWORD', ''),
'charset' => 'utf8',
'prefix' => '',
'prefix_indexes' => true,
],