mongodb比较复杂的综合统计计算，性能还不差

db.app_users.aggregate([
{
$project:{
fs:1,
ls:1,
subt:{$subtract:['$ls','$fs']},
days714:{
$cond: [ { $gte:['$ls',(Math.round((new Date()).getTime() / 1000)-14*24*60*60)]},1,0]
},
days1430:{
$cond: [
{
$and:[
{ $lte:['$ls',(Math.round((new Date()).getTime() / 1000)-14*24*60*60)]},
{ $gte:['$ls',(Math.round((new Date()).getTime() / 1000)-30*24*60*60)]}
]
},1,0]
},

days30:{
$cond: [ { $lte:['$ls',(Math.round((new Date()).getTime() / 1000)-30*24*60*60)]},1,0]
},

days815:{
$cond: [
{
$and:[
{ $lte:['$ls',(Math.round((new Date()).getTime() / 1000)-8*24*60*60)]},
{ $gte:['$ls',(Math.round((new Date()).getTime() / 1000)-15*24*60*60)]}
]
},1,0]
},
days1531:{
$cond: [
{
$and:[
{ $lte:['$ls',(Math.round((new Date()).getTime() / 1000)-15*24*60*60)]},
{ $gte:['$ls',(Math.round((new Date()).getTime() / 1000)-31*24*60*60)]}
]
},1,0]
},

days31:{
$cond: [ { $lte:['$ls',(Math.round((new Date()).getTime() / 1000)-31*24*60*60)]},1,0]
},
}
},
{
$match:{
subt:{$lt:24*60*60},
ls:{ $lt:(Math.round((new Date()).getTime() / 1000)-7*24*60*60)}
}
},
{
$group:{
'_id':null,
days7_14: {$sum: "$days714"},
days14_30: {$sum: "$days1430"},
days_more30: {$sum: "$days30"},
days8_15: {$sum: "$days715"},
days15_31: {$sum: "$days1531"},
days_more31: {$sum: "$days30"}
}
}
])