php中的mongodb select常用操作代码示例

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：

{ "_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

> 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：

$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

> 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

$collection->findOne();  

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

3、find snapshot 游标

> 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：

/** 

* 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

> 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：

$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

> 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：

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

6、排序

> 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：

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

7、模糊查询

> 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：

$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

> 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：

$param = array("money" => array('$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

> 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：

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

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

foreach ($result as $id=>$value) {  

 var_dump($value);  

}

10、distinct

> 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：

$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。