Fusion表查询

Question

我想在Google Fusion Table上执行查询。让我们假设我正在使用以下变量组装字符串。如果var sort_factors中只有一个参数，那么一切正常。如何向sort_factors添加第二个参数，以便我可以（例如）按日期降序排序并将响应限制为1000行？

var base         = 'https://www.googleapis.com/fusiontables/v2/query?',
    columns      = 'sql=SELECT+Lat,Lng,Date,Username,TripID',
    from         = '+from+XXXXXXXXXXXXXXXXXXX',
    sort_factors = '+LIMIT+1000+AND+ORDER+BY+Date+DESC',
    key          = '&key=XXXXXXXXXXXXXXXXXXX';

Answer 1

LIMIT不是排序，AND错误，LIMIT必须是SQL中的最后一个子句：

'+ORDER+BY+Date+DESC+LIMIT+1000'

条款的顺序是固定的，必须是：

1. ，其中
2. group
3. 订单
4. limit

你的代码似乎是Javascript，你最好帮个忙，让JS处理编码。

可能的方法：

＆＃13;
＆＃13;
var base = 'https://www.googleapis.com/fusiontables/v2/query',
  columns = 'SELECT Lat,Lng,Date,Username,TripID',
  from = 'from fusionTableID',
  //apply a filter when you want to
  where = '',
  //group the results when you want to
  groupby = '',
  orderby = 'ORDER BY DATE DESC',
  limit = 'LIMIT 1000',
  key = 'yourApiKey',
  //do you want a JSONP-response? Add a callback-parameter
  callback = '&callback=functionName',
  //prepare the query;
  sql = encodeURIComponent([columns, from, where, groupby, orderby, limit].join(' ')),
  //prepare the url
  url = [base, '?sql=', sql, callback, '&key=', key].join('');

//see what we got
document.body.appendChild(document.createTextNode(url));
＆＃13;
body {
  font-family: Monospace
}
＆＃13;
＆＃13;
＆＃13;

使用所有4个子句进行演示：http://jsfiddle.net/doktormolle/fc47243g/

Answer 2

I don't know if this completely makes the query work, but you're missing some spaces where you had +:

var base         = 'https://www.googleapis.com/fusiontables/v2/query?',
    columns      = 'sql=SELECT Lat,Lng,Date,Username,TripID ',
    from         = '+from XXXXXXXXXXXXXXXXXXX ',
    sort_factors = '+LIMIT 1000 AND ORDER BY Date DESC ',
    key          = '&key=XXXXXXXXXXXXXXXXXXX';