| SQLQueryBuilder | Uses SQL generators to generate valid SQL queries for a specific type of RDBMS. |
| SQLQueryBuilderInterface | Represents how a SQL query builder must be implemented when designing a new database connector. |
| MySQLQueryBuilder | Uses SQL generators to generate valid SQL queries for MySQL. |
| PostgreSQLQueryBuilder | Uses SQL generators to generate valid SQL queries for PostgreSQL. |
| SQLiteQueryBuilder | Uses SQL generators to generate valid SQL queries for SQLite. |