要使用ag-grid在两列中显示单个列值，可以使用列定义的valueFormatter和valueGetter属性。valueFormatter允许您格式化单元格中显示的值，而valueGetter允许您获取用于筛选和排序的值。例如，如果有一列包含日期时间值，则可以将其拆分为两列：一个用于日期，一个用于时间。下面是一个可能的代码片段：

// Define a function to format the date part of the datetime value
const formatDate = (value) => {
  // Assume the value is in ISO format: YYYY-MM-DDTHH:mm:ss
  // Split the value at the "T" character
  const [date, time] = value.split("T");
  // Return the date part
  return date;
};

// Define a function to format the time part of the datetime value
const formatTime = (value) => {
  // Assume the value is in ISO format: YYYY-MM-DDTHH:mm:ss
  // Split the value at the "T" character
  const [date, time] = value.split("T");
  // Return the time part
  return time;
};

// Define a function to get the datetime value from the data object
const getDateTime = (params) => {
  // Assume the data object has a property called "datetime"
  return params.data.datetime;
};

// Define an array of column definitions
const columnDefs = [
  {
    headerName: "Date",
    field: "date",
    // Use the formatDate function as the valueFormatter
    valueFormatter: formatDate,
    // Use the getDateTime function as the valueGetter
    valueGetter: getDateTime,
  },
  {
    headerName: "Time",
    field: "time",
    // Use the formatTime function as the valueFormatter
    valueFormatter: formatTime,
    // Use the getDateTime function as the valueGetter
    valueGetter: getDateTime,
  },
];

通过此设置，您可以使用ag-grid在两列中显示单个列值。