前面说到了mongodb安装，配置，集群，以及php的插入与更新等，请参考：mongodb。

下面说一下，mongodb select的常用操作

测试数据：

复制代码 代码如下:

{ "_id" : 1, "title" : "红楼梦", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }

1、取表条数

复制代码 代码如下:

> db.books.count();

4

> db.books.find().count();

4

> db.books.count({auther: "李白" });

2

> db.books.find({money:{$gt:40,$lte:60}}).count();

1

> db.books.count({money:{$gt:40,$lte:60}});

1

php代码如下，按顺序对应的：

复制代码 代码如下:

$collection->count(); //结果：4

$collection->find()->count(); //结果：4

$collection->count(array("auther"=>"李白")); //结果：2

$collection->find(array("money"=>array('$gt'=>40,'$lte'=>60)))->count(); //结果：1

$collection->count(array("money"=>array('$gt'=>40,'$lte'=>60))); //结果：1

提示：$gt为大于、$gte为大于等于、$lt为小于、$lte为小于等于、$ne为不等于、$exists不存在、$in指定范围、$nin指定不在某范围

2、取单条数据

复制代码 代码如下:

> db.books.findOne();

{

"_id" : 1,

"title" : "红楼梦",

"auther" : "曹雪芹",

"typeColumn" : "test",

"money" : 80,

"code" : 10

}

> db.books.findOne({auther: "李白" });

{

"_id" : 3,

"title" : "朝发白帝城",

"auther" : "李白",

"typeColumn" : "test",

"money" : 30,

"code" : 30

}

php代码如下，按顺序对应的

复制代码 代码如下:

$collection->findOne();

$collection->findOne(array("auther"=>"李白"));

3、find snapshot 游标

复制代码 代码如下:

> db.books.find( { $query: {auther: "李白" }, $snapshot: true } );

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }

php代码如下：

复制代码 代码如下:

/**

* 注意:

* 在我们做了find()操作，获得 $result 游标之后，这个游标还是动态的.

* 换句话说,在我find()之后,到我的游标循环完成这段时间,如果再有符合条件的记录被插入到collection,那么这些记录也会被$result 获得.

*/

$result = $collection->find(array("auther"=>"李白"))->snapshot();

foreach ($result as $id => $value) {

var_dump($value);

}

4、自定义列显示

复制代码 代码如下:

> db.books.find({},{"money":0,"auther":0}); //money和auther不显示

{ "_id" : 1, "title" : "红楼梦", "typeColumn" : "test", "code" : 10 }

{ "_id" : 2, "title" : "围城", "typeColumn" : "test", "code" : 20 }

{ "_id" : 3, "title" : "朝发白帝城", "typeColumn" : "test", "code" : 30 }

{ "_id" : 4, "title" : "将近酒", "code" : 40 }

> db.books.find({},{"title":1}); //只显示title列

{ "_id" : 1, "title" : "红楼梦" }

{ "_id" : 2, "title" : "围城" }

{ "_id" : 3, "title" : "朝发白帝城" }

{ "_id" : 4, "title" : "将近酒" }

/**

*money在60到100之间，typecolumn和money二列必须存在

*/

> db.books.find({money:{$gt:60,$lte:100}},{"typeColumn":1,"money":1});

{ "_id" : 1, "typeColumn" : "test", "money" : 80 }

{ "_id" : 4, "money" : 90 }

php代码如下，按顺序对应的：

复制代码 代码如下:

$result = $collection->find()->fields(array("auther"=>false,"money"=>false)); //不显示auther和money列

$result = $collection->find()->fields(array("title"=>true)); //只显示title列

/**

*money在60到100之间，typecolumn和money二列必须存在

*/

$where=array('typeColumn'=>array('$exists'=>true),'money'=>array('$exists'=>true,'$gte'=>60,'$lte'=>100));

$result = $collection->find($where);

5、分页

复制代码 代码如下:

> db.books.find().skip(1).limit(1); //跳过第条，取一条

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

这根mysql，limit,offset有点类似，php代码如下：

复制代码 代码如下:

$result = $collection->find()->limit(1)->skip(1);//跳过 1 条记录，取出 1条

6、排序

复制代码 代码如下:

> db.books.find().sort({money:1,code:-1}); //1表示降序 -1表示升序,参数的先后影响排序顺序

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

{ "_id" : 1, "title" : "红楼梦", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }

{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }

php代码如下：

复制代码 代码如下:

$result = $collection->find()->sort(array('code'=>1,'money'=>-1));

7、模糊查询

复制代码 代码如下:

> db.books.find({"title":/城/}); //like '%str%' 糊查询集合中的数据

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

> db.books.find({"auther":/^李/}); //like 'str%' 糊查询集合中的数据

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }

> db.books.find({"auther":/书$/}); //like '%str' 糊查询集合中的数据

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

> db.books.find( { "title": { $regex: '城', $options: 'i' } } ); //like '%str%' 糊查询集合中的数据

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

php代码如下，按顺序对应的：

复制代码 代码如下:

$param = array("title" => new MongoRegex('/城/'));

$result = $collection->find($param);

$param = array("auther" => new MongoRegex('/^李/'));

$result = $collection->find($param);

$param = array("auther" => new MongoRegex('/书$/'));

$result = $collection->find($param);

8、$in和$nin

复制代码 代码如下:

> db.books.find( { money: { $in: [ 20,30,90] } } ); //查找money等于20，30，90的数据

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }

> db.books.find( { auther: { $in: [ /^李/,/^钱/ ] } } ); //查找以李，钱开头的数据

{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }

{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }

php代码如下，按顺序对应的：

复制代码 代码如下:

$param = array("money" => array('$in'=>array(20,30,90)));

$result = $collection->find($param);

foreach ($result as $id=>$value) {

var_dump($value);

}

$param = array("auther" => array('$in'=>array(new MongoRegex('/^李/'),new MongoRegex('/^钱/'))));

$result = $collection->find($param);

foreach ($result as $id=>$value) {

var_dump($value);

}

9、$or

复制代码 代码如下:

> db.books.find( { $or: [ { money: 20 }, { money: 80 } ] } ); //查找money等于20，80的数据

{ "_id" : 1, "title" : "红楼梦", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }

php代码如下：

复制代码 代码如下:

$param = array('$or'=>array(array("money"=>20),array("money"=>80)));

$result = $collection->find($param);

foreach ($result as $id=>$value) {

var_dump($value);

}

10、distinct

复制代码 代码如下:

> db.books.distinct( 'auther' );

[ "曹雪芹", "钱钟书", "李白" ]

> db.books.distinct( 'auther' , { money: { $gt: 60 } });

[ "曹雪芹", "李白" ]

php代码如下：

复制代码 代码如下:

$result = $curDB->command(array("distinct" => "books", "key" => "auther"));

foreach ($result as $id=>$value) {

var_dump($value);

}

$where = array("money" => array('$gte' => 60));

$result = $curDB->command(array("distinct" => "books", "key" => "auther", "query" => $where));

foreach ($result as $id=>$value) {

var_dump($value);

}

先写到这儿，上面只是SELECT的一些常用操作，接下来，还会写一点。