This issue occurs because the sql_require_primary_key flag in MySQL prevents the creation of tables without a primary key. Because of the way Laravel's Schema builder assigns primary keys to ...

PostgreSQL-compatible TPC-H benchmark, with wrapper scripts for populating data and evaluating performance - pg-tpch/primary_keys.sql at master · 2ndQuadrant/pg-tpch ...

In Microsoft SQL Server, for example, a primary key usually equates to a clustered index. In SQLite, a primary key is usually just a unique index and is distinct from the special rowid column name.

Now, this app uses surrogate keys extensively (Django doesn't allow composite primary keys and encourages the use of surrogates heavily). For the first migration scripts I've tentatively skipped ...