mongodb的写操作

使用插入数据命令：

>insert

需要注意的是，如果插入一文件（现在理解，nosql 类型的db数据不能说是记录了，它是已文件作为单位，而传统型的关系型数据库，我们说是插入一条记录），如果没有带人_id,那么会自动生成一个唯一的id,这个id好比关系型数据库里的主键一样。

如果是自己指定id，那么必须id是唯一的，这点关系型和nosql型都必须要求的；

数据字段的名字不能包含$ 和.

在敲了一阵发现，擦，我要是再shell里面去编写复杂的插入语句，就shell的这种一行一句，不搞死我去啊。我想它肯定是支持向bat这种批处理或者其他，看它语法和js一模一样，于是大胆猜测它使用的就是javascript,于是我就用notepad++来编辑这些插入命令，试着插入复杂的对象；

哦，另外说一句，如果这个bios数据不存在，那么要先使用

>use bios

生成一个数据库，如果你不往这里插入一笔数据，mongoDB会自动删除掉这个数据库；

所以还要插入一笔让mongodb维持这数据库的任意数据

>db.bios.insert({a:'a'})

编写了一个insert.js脚步，放在安装目录的js文件夹下。于是这样输入：

>mongolocalhost:27017/bios f:mongodbjsinsert.js

效果如图

可以看到，这个js脚步成功执行；

要查询这个文档，输入命令：

>db.bios.find({ name: { first: 'John', last: 'chen' } } );

有了js写更多的语句，就方便多了。

Isert语句支持多个批量插入就像下面这样:

Insert.js 语句：

db.bios.insert(
[
{
_id: 3,
name: { first: ‘Grace’, last: ‘Hopper’ },
title: ‘Rear Admiral’,
birth: new Date(‘Dec 09, 1906’),
death: new Date(‘Jan 01, 1992’),
contribs: [ ‘UNIVAC’, ‘compiler’, ‘FLOW-MATIC’, ‘COBOL’ ],
awards: [
{
award: ‘Computer Sciences Man of the Year’,
year: 1969,
by: ‘Data Processing Management Association’
},
{
award: ‘Distinguished Fellow’,
year: 1973,
by: ‘ British Computer Society’
},
{
award: ‘W. W. McDowell Award’,
year: 1976,
by: ‘IEEE Computer Society’
},
{
award: ‘National Medal of Technology’,
year: 1991,
by: ‘United States’
}
]
},
{
_id: 4,
name: { first: ‘Kristen’, last: ‘Nygaard’ },
birth: new Date(‘Aug 27, 1926’),
death: new Date(‘Aug 10, 2002’),
contribs: [ ‘OOP’, ‘Simula’ ],
awards: [
{
award: ‘Rosing Prize’,
year: 1999,
by: ‘Norwegian Data Association’
},
{
award: ‘Turing Award’,
year: 2001,
by: ‘ACM’
},
{
award: ‘IEEE John von Neumann Medal’,
year: 2001,
by: ‘IEEE’
}
]
},
{
_id: 5,
name: { first: ‘Ole-Johan’, last: ‘Dahl’ },
birth: new Date(‘Oct 12, 1931’),
death: new Date(‘Jun 29, 2002’),
contribs: [ ‘OOP’, ‘Simula’ ],
awards: [
{
award: ‘Rosing Prize’,
year: 1999,
by: ‘Norwegian Data Association’
},
{
award: ‘Turing Award’,
year: 2001,
by: ‘ACM’
},
{
award: ‘IEEE John von Neumann Medal’,
year: 2001,
by: ‘IEEE’
}
]
}
]
);
db.bios.insert(
{
name: { first: ‘John’, last: ‘McCarthy’ },
birth: new Date(‘Sep 04, 1927’),
death: new Date(‘Dec 24, 2011’),
contribs: [ ‘Lisp’, ‘Artificial Intelligence’, ‘ALGOL’ ],
awards: [
{
award: ‘Turing Award’,
year: 1971,
by: ‘ACM’
},
{
award: ‘Kyoto Prize’,
year: 1988,
by: ‘Inamori Foundation’
},
{
award: ‘National Medal of Science’,
year: 1990,
by: ‘National Science Foundation’
}
]
}
)
c = db.bios.find( { name: { first: ‘John’, last: ‘McCarthy’ } } );
while((c.hasNext())) printjson(c.next())