{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[25:30]  hl[25:27,30] *}

### Crear Tablas de Base de Datos al Arrancar { #create-database-tables-on-startup }

Crearemos las tablas de la base de datos cuando arranque la aplicación.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

Aquí creamos las tablas en un evento de inicio de la aplicación.

    assertEquals((Character) 'a', table1.get("foo", 1));

    Table<String, Integer, Character> table2 = HashBasedTable.create(100, 0);
    table2.put("foo", 1, 'a');
    assertEquals((Character) 'a', table2.get("foo", 1));

    Table<String, Integer, Character> table3 = HashBasedTable.create(0, 20);
    table3.put("foo", 1, 'a');
    assertEquals((Character) 'a', table3.get("foo", 1));

  }

  static boolean equalsImpl(Table<?, ?, ?> table, @Nullable Object obj) {
    if (obj == table) {
      return true;
    } else if (obj instanceof Table) {
      Table<?, ?, ?> that = (Table<?, ?, ?>) obj;
      return table.cellSet().equals(that.cellSet());
    } else {
      return false;
    }
  }

  }

  static boolean equalsImpl(Table<?, ?, ?> table, @Nullable Object obj) {
    if (obj == table) {
      return true;
    } else if (obj instanceof Table) {
      Table<?, ?, ?> that = (Table<?, ?, ?>) obj;
      return table.cellSet().equals(that.cellSet());
    } else {
      return false;
    }
  }

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[25:30]  hl[25:27,30] *}

### Criar Tabelas de Banco de Dados na Inicialização { #create-database-tables-on-startup }

Vamos criar as tabelas do banco de dados quando o aplicativo for iniciado.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

Aqui, criamos as tabelas em um evento de inicialização do aplicativo.

  /**
   * Copies all mappings from the specified table to this table. The effect is equivalent to calling
   * {@link #put} with each row key / column key / value mapping in {@code table}.
   *
   * @param table the table to add to this table
   */
  void putAll(Table<? extends R, ? extends C, ? extends V> table);

  /**
   * Removes the mapping, if any, associated with the given keys.
   *

  /**
   * Copies all mappings from the specified table to this table. The effect is equivalent to calling
   * {@link #put} with each row key / column key / value mapping in {@code table}.
   *
   * @param table the table to add to this table
   */
  void putAll(Table<? extends R, ? extends C, ? extends V> table);

  /**
   * Removes the mapping, if any, associated with the given keys.
   *

    return Collector.of(
        tableSupplier,
        (table, input) ->
            mergeTables(
                table,
                rowFunction.apply(input),
                columnFunction.apply(input),
                valueFunction.apply(input),
                mergeFunction),
        (table1, table2) -> {
          for (Table.Cell<R, C, V> cell2 : table2.cellSet()) {
            mergeTables(

    new EqualsTester()
        .addEqualityGroup(table1, wrap(table1), wrap(table1))
        .addEqualityGroup(table2, wrap(table2))
        .testEquals();
  }

  private static <R, C, V> Table<R, C, V> wrap(Table<R, C, V> delegate) {
    return new ForwardingTable<R, C, V>() {
      @Override
      protected Table<R, C, V> delegate() {
        return delegate;
      }
    };
  }

    new EqualsTester()
        .addEqualityGroup(table1, wrap(table1), wrap(table1))
        .addEqualityGroup(table2, wrap(table2))
        .testEquals();
  }

  private static <R, C, V> Table<R, C, V> wrap(Table<R, C, V> delegate) {
    return new ForwardingTable<R, C, V>() {
      @Override
      protected Table<R, C, V> delegate() {
        return delegate;
      }
    };
  }