Azure cosmosdb CosmosDB，SQL查询，使用unixtimestamp筛选时间戳字段

我有一个cosmosdb，我正在用SQL查询它，我想在UnixtTimeStamp格式的时间戳字段上进行过滤。以下是我到目前为止提出的问题：

SELECT 
root._id as hpid
,root.FirstConnected["$date"] as FirstConnected
,root.LastUpdated["$date"] as LastUpdated
,var._id as varid
,var.Values[0].Timestamp["$date"] as TimeStamp
,var.Values[0]["Value"] as Val
FROM root 
JOIN var IN root.Variables
WHERE 
var._id IN (99998,99999) AND 
var.Values[0].Timestamp["$date"] >= 1523270312001

结果如下：

[
{
    "hpid": 21032,
    "FirstConnected": 1522835868346,
    "LastUpdated": 1523360279908,
    "varid": 99998,
    "TimeStamp": 1523270312001,
    "Val": 8888
}
]

当前是一种能够动态过滤UnixTimeStamp中的时间戳值的好方法吗？假设我想从今天开始过滤最后5天

---

感谢您的帮助。

是的，上述方法应该有效

var fiveDaysAgo = new Date();
fiveDaysAgo.setDate(d.getDate() - 5);
var threshold = twoDaysAgo.getTime() / 1000;

SELECT 
root._id as hpid
,root.FirstConnected["$date"] as FirstConnected
,root.LastUpdated["$date"] as LastUpdated
,var._id as varid
,var.Values[0].Timestamp["$date"] as TimeStamp
,var.Values[0]["Value"] as Val
FROM root 
JOIN var IN root.Variables
WHERE 
var._id IN (99998,99999) AND 
var.Values[0].Timestamp["$date"] >= @threshold

---

要动态计算时间戳，可以在Cosmos DB中创建一个用户定义函数（udf），并在查询中调用它

例如，可以按如下方式定义自定义项：

function getDateTarget(){
    var date = new Date();
    date.setDate(date.getDate() - 5)
    return Math.floor(date.getTime() / 1000);
}

并在查询中使用它：

SELECT*FROM c WHERE c.\u ts>udf.getDateTarget（）