what is a database?

General error: 11 database disk image is malformed (SQL: select * from sqlite_master where type = 'table' and name = migrations)

The SELECT permission has not been granted on 'sys.sql_logins' for the 'master' database. You must be a member of the 'loginmanager' role to access this system view.

raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__) django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.

Illuminate\Database\QueryException SQLSTATE[HY000] [2002] Connection refused (SQL: select * from information_schema.tables where table_schema = laravel and table_name = migrations and table_type = 'BASE TABLE')

[Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1071 La clé est trop longue. Longueur maximale: 1000 (SQL: alter table `users` add unique `users_email_unique`(`email`))