mongodb 计算
mongodb 集群 分片 副本集
三个字段
name address time
li 1 2010/01/01 00:00:00
li 2 2010/01/01 00:10:00
wang 1 2010/01/01 00:00:00
li 1 2010/01/01 00:05:00
wang 2 2010/01/01 00:05:00
wang 1 2010/01/01 00:20:00
.....
需求:
根据name分组 并且保证是按照time排序进行的
{li,{1,2010/01/01 00:00:00},{1,2010/01/01 00:05:00},{2,2010/01/01 00:10:00}}
{wang,{1,2010/01/01 00:00:00},{2,2010/01/01 00:05:00},{1,2010/01/01 00:20:00}}
.....
然后计算对应的value
{1->2,300s}
{2->1,900s}
......