代碼：

db.blogs.insert([
{
“author”: “張三”,
“title”: “MongoDB簡介”,
“content”: “它是介于關(guān)系型數(shù)據(jù)庫和非關(guān)系型數(shù)據(jù)庫之間的一種NoSQL數(shù)據(jù)庫，用C++編寫，是一款集敏捷性、可伸縮性、擴(kuò)展性于一身的高性能的面向文檔的通用數(shù)據(jù)庫”,
“tags”: [
“MongoDB”,
“NoSQL”
],
“comment”: [
{
“name”: “Jack”,
“detail”: “Good！”,
“date”: ISODate(“2015-07-09 09:55:49”)
},
{
“name”: “Tom”,
“detail”: “Hello World！”,
“date”: ISODate(“2015-07-09 18:12:35”)
},
{
“name”: “Alice”,
“detail”: “你好，Mongo！”,
“date”: ISODate(“2015-07-10 20:30:30”)
}
],
“readCount”: 154
},
{
“author”: “李四”,
“title”: “1+1等于幾”,
“content”: “有的人說1+1=2，因為這是老師從小告訴我們的；而有的人說1+1=11，這是兩個1的組合；但是有些人就認(rèn)為1+1=1，他們覺得1個團(tuán)隊加上另一個團(tuán)隊，會組成了一個更強(qiáng)大的團(tuán)隊！”,
“tags”: [
“story”,
“rule”,
“數(shù)學(xué)”
],
“comment”: [
{
“name”: “王小光”,
“detail”: “每個人心里邊都有自己的答案。”,
“date”: ISODate(“2015-07-10 11:45:57”)
}
],
“readCount”: 367
},
{
“author”: “李四”,
“title”: “如何寫一篇好的博客？”,
“content”: “1、目標(biāo)；2、堅持；3、分享；4、學(xué)習(xí)；5、提高”,
“tags”: null,
“comment”: [
{
“name”: “小明”,
“detail”: “ComeOn!!!!”,
“date”: ISODate(“2015-07-10 14:49:06”)
},
{
“name”: “Nike”,
“detail”: “終身學(xué)習(xí)！”,
“date”: ISODate(“2015-07-11 10:22:36”)
},
{
“name”: “小紅”,
“detail”: “貴在堅持吧、”,
“date”: ISODate(“2015-07-12 12:12:12”)
}
],
“readCount”: 1489,
“isTop”: true
}
])

Test Data