[Column Name] Time (PartitionKey) [Type] string [Example] 20110809T0800 [Description] 
For hour metrics, a timestamp in UTC that represents the starting hour for metrics, in the following format: YYYYMMddThhmm. This value is the partition key for all entries in the table. For minute metrics, the format is the same, but the minute value is an approximate indication of the time when the transactions were executed. Transactions from earlier minutes may be aggregated into the transaction for the current minute if they were missed in the previous interval.