四、MongoDB的查询

 1 db.blogs.insert([
 2     {
 3         "author": "张三",
 4         "title": "MongoDB简介",
 5         "content": "它是介于关系型数据库和非关系型数据库之间的一种NoSQL数据库，用C++编写，是一款集敏捷性、可伸缩性、扩展性于一身的高性能的面向文档的通用数据库",
 6         "tags": [
 7             "MongoDB",
 8             "NoSQL"
 9         ],
10         "comment": [
11             {
12                 "name": "Jack",
13                 "detail": "Good！",
14                 "date": ISODate("2015-07-09 09:55:49")
15             },
16             {
17                 "name": "Tom",
18                 "detail": "Hello World！",
19                 "date": ISODate("2015-07-09 18:12:35")
20             },
21             {
22                 "name": "Alice",
23                 "detail": "你好，Mongo！",
24                 "date": ISODate("2015-07-10 20:30:30")
25             }
26         ],
27         "readCount": 154
28     },
29     {
30         "author": "李四",
31         "title": "1+1等于几",
32         "content": "有的人说1+1=2，因为这是老师从小告诉我们的；而有的人说1+1=11，这是两个1的组合；但是有些人就认为1+1=1，他们觉得1个团队加上另一个团队，会组成了一个更强大的团队！",
33         "tags": [
34             "story",
35             "rule",
36             "数学"
37         ],
38         "comment": [
39             {
40                 "name": "王小光",
41                 "detail": "每个人心里边都有自己的答案。",
42                 "date": ISODate("2015-07-10 11:45:57")
43             }
44         ],
45         "readCount": 367
46     },
47     {
48         "author": "李四",
49         "title": "如何写一篇好的博客？",
50         "content": "1、目标；2、坚持；3、分享；4、学习；5、提高",
51         "tags": null,
52         "comment": [
53             {
54                 "name": "小明",
55                 "detail": "ComeOn!!!!",
56                 "date": ISODate("2015-07-10 14:49:06")
57             },
58             {
59                 "name": "Nike",
60                 "detail": "终身学习！",
61                 "date": ISODate("2015-07-11 10:22:36")
62             },
63             {
64                 "name": "小红",
65                 "detail": "贵在坚持吧、",
66                 "date": ISODate("2015-07-12 12:12:12")
67             }
68         ],
69         "readCount": 1489,
70         "isTop": true
71     }
72 ])
Test Data