How to create a custom table using hook_schema() from .install file in Drupal

modulename.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the modulename module.
 */


/**
 * Implements hook_schema().
 */
function modulename_schema() {
  // Table name 'custom_install_example'. 
  $schema['custom_install_example'] = [
    'description' => 'Table description.',
    'fields' => [
      'id' => [
        'type' => 'serial',
        'not null' => TRUE,
        'description' => 'Primary Key: Unique record ID.',
      ],
      'uid' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {users}.uid of the user who created the record.',
      ],
      'status' => [
        'description' => 'Boolean indicating whether this record is active.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
      ],
      'type' => [
        'type' => 'varchar_ascii',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Type of the record.',
      ],
      'created' => [
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Timestamp when the record was created.',
      ],
      'data' => [
        'type' => 'blob',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'The arbitrary data for the item.',
      ],
    ],
    'primary key' => ['id'],
    'indexes' => [
      'type' => ['type'],
      'uid' => ['uid'],
      'status' => ['status'],
    ],
  ];

  return $schema;
}