code: public function initialize() {
          parent::initialize();
  
          $this->addClauses([
              self::DEFERRABLE        => 'DEFERRABLE %s',
              self::EITHER            => 'OR %s',
              self::MATCH             => 'MATCH %s',
              self::NOT_DEFERRABLE    => 'NOT DEFERRABLE %s',
              self::UNIQUE_KEY        => 'UNIQUE (%2$s)'
          ]);
  
          $this->addKeywords([
              self::ABORT             => 'ABORT',
              self::BINARY            => 'BINARY',
              self::AUTO_INCREMENT    => 'AUTOINCREMENT',
              self::FAIL              => 'FAIL',
              self::IGNORE            => 'IGNORE',
              self::INIT_DEFERRED     => 'INITIALLY DEFERRED',
              self::INIT_IMMEDIATE    => 'INITIALLY IMMEDIATE',
              self::NOCASE            => 'NOCASE',
              self::PRIMARY_KEY       => 'PRIMARY KEY',
              self::REPLACE           => 'REPLACE',
              self::ROLLBACK          => 'ROLLBACK',
              self::RTRIM             => 'RTRIM',
              self::UNIQUE            => 'UNIQUE'
          ]);
  
          $this->addStatements([
              Query::INSERT        => new Statement('INSERT {or} INTO {table} {fields} VALUES {values}'),
              Query::SELECT        => new Statement('SELECT {distinct} {fields} FROM {table} {joins} {where} {groupBy} {having} {compounds} {orderBy} {limit}'),
              Query::UPDATE        => new Statement('UPDATE {or} {table} SET {fields} {where}'),
              Query::DELETE        => new Statement('DELETE FROM {table} {where}'),
              Query::CREATE_TABLE  => new Statement("CREATE {temporary} TABLE IF NOT EXISTS {table} (\n{columns}{keys}\n)"),
              Query::CREATE_INDEX  => new Statement('CREATE {type} INDEX IF NOT EXISTS {index} ON {table} ({fields})'),
              Query::DROP_TABLE    => new Statement('DROP TABLE IF EXISTS {table}'),
              Query::DROP_INDEX    => new Statement('DROP INDEX IF EXISTS {index}')
          ]);
  
          // SQLite doesn't support TRUNCATE
          unset($this->_statements[Query::TRUNCATE]);
      }
docs: Modify clauses and keywords.