ant-design-vue/components/table/demo/grouping-columns.md

<cn>
#### 表头分组
`columns[n]` 可以内嵌 `children`，以渲染分组表头。
</cn>

<us>
#### Grouping table head
Group table head with `columns[n].children`.
</us>

```html
<template>
  <a-table
    :columns="columns"
    :dataSource="data"
    bordered
    size="middle"
    :scroll="{ x: '130%', y: 240 }"
  />
</template>
<script>
  const columns = [
    {
      title: 'Name',
      dataIndex: 'name',
      key: 'name',
      width: 100,
      fixed: 'left',
      filters: [
        {
          text: 'Joe',
          value: 'Joe',
        },
        {
          text: 'John',
          value: 'John',
        },
      ],
      onFilter: (value, record) => record.name.indexOf(value) === 0,
    },
    {
      title: 'Other',
      children: [
        {
          title: 'Age',
          dataIndex: 'age',
          key: 'age',
          width: 200,
          sorter: (a, b) => a.age - b.age,
        },
        {
          title: 'Address',
          children: [
            {
              title: 'Street',
              dataIndex: 'street',
              key: 'street',
              width: 200,
            },
            {
              title: 'Block',
              children: [
                {
                  title: 'Building',
                  dataIndex: 'building',
                  key: 'building',
                  width: 100,
                },
                {
                  title: 'Door No.',
                  dataIndex: 'number',
                  key: 'number',
                  width: 100,
                },
              ],
            },
          ],
        },
      ],
    },
    {
      title: 'Company',
      children: [
        {
          title: 'Company Address',
          dataIndex: 'companyAddress',
          key: 'companyAddress',
        },
        {
          title: 'Company Name',
          dataIndex: 'companyName',
          key: 'companyName',
        },
      ],
    },
    {
      title: 'Gender',
      dataIndex: 'gender',
      key: 'gender',
      width: 80,
      fixed: 'right',
    },
  ];

  const data = [];
  for (let i = 0; i < 100; i++) {
    data.push({
      key: i,
      name: 'John Brown',
      age: i + 1,
      street: 'Lake Park',
      building: 'C',
      number: 2035,
      companyAddress: 'Lake Street 42',
      companyName: 'SoftLake Co',
      gender: 'M',
    });
  }

  export default {
    data() {
      return {
        data,
        columns,
      };
    },
  };
</script>
```