php中的mongodb select常用操作代码示例_php实例

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：

<br />{ "_id" : 1, "title" : "红楼梦", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }  <br />{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 } <br />

1、取表条数

<br />> db.books.count();  <br />4  <br />  <br />> db.books.find().count();  <br />4  <br />  <br />> db.books.count({auther: "李白" });  <br />2  <br />  <br />> db.books.find({money:{$gt:40,$lte:60}}).count();  <br />1  <br />  <br />> db.books.count({money:{$gt:40,$lte:60}});  <br />1  <br />

php代码如下，按顺序对应的：

<br />$collection->count();             //结果：4  <br />$collection->find()->count();     //结果：4  <br />$collection->count(array("auther"=>"李白"));   //结果：2  <br />$collection->find(array("money"=>array('$gt'=>40,'$lte'=>60)))->count();     //结果：1  <br />$collection->count(array("money"=>array('$gt'=>40,'$lte'=>60)));    //结果：1  <br />

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

<br />> db.books.findOne();  <br />{  <br />        "_id" : 1,  <br />        "title" : "红楼梦",  <br />        "auther" : "曹雪芹",  <br />        "typeColumn" : "test",  <br />        "money" : 80,  <br />        "code" : 10  <br />}  <br />  <br />> db.books.findOne({auther: "李白" });  <br />{  <br />        "_id" : 3,  <br />        "title" : "朝发白帝城",  <br />        "auther" : "李白",  <br />        "typeColumn" : "test",  <br />        "money" : 30,  <br />        "code" : 30  <br />}  <br />

php代码如下，按顺序对应的

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

3、find snapshot 游标

<br />> db.books.find( { $query: {auther: "李白" }, $snapshot: true } );  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 } <br />

php代码如下：

<br />/** <br />* 注意: <br />* 在我们做了find()操作，获得 $result 游标之后，这个游标还是动态的. <br />* 换句话说,在我find()之后,到我的游标循环完成这段时间,如果再有符合条件的记录被插入到collection,那么这些记录也会被$result 获得. <br />*/  <br />$result = $collection->find(array("auther"=>"李白"))->snapshot();  <br />foreach ($result as $id => $value) {  <br /> var_dump($value);  <br />}<br />

4、自定义列显示

<br />> db.books.find({},{"money":0,"auther":0});      //money和auther不显示  <br />{ "_id" : 1, "title" : "红楼梦", "typeColumn" : "test", "code" : 10 }  <br />{ "_id" : 2, "title" : "围城", "typeColumn" : "test", "code" : 20 }  <br />{ "_id" : 3, "title" : "朝发白帝城", "typeColumn" : "test", "code" : 30 }  <br />{ "_id" : 4, "title" : "将近酒", "code" : 40 }  <br />  <br />> db.books.find({},{"title":1});          //只显示title列  <br />{ "_id" : 1, "title" : "红楼梦" }  <br />{ "_id" : 2, "title" : "围城" }  <br />{ "_id" : 3, "title" : "朝发白帝城" }  <br />{ "_id" : 4, "title" : "将近酒" }  <br />  <br />/** <br />*money在60到100之间，typecolumn和money二列必须存在 <br />*/  <br />> db.books.find({money:{$gt:60,$lte:100}},{"typeColumn":1,"money":1});  <br />{ "_id" : 1, "typeColumn" : "test", "money" : 80 }  <br />{ "_id" : 4, "money" : 90 }  <br />

php代码如下，按顺序对应的：

<br />$result = $collection->find()->fields(array("auther"=>false,"money"=>false));    //不显示auther和money列  <br />  <br />$result = $collection->find()->fields(array("title"=>true));      //只显示title列  <br />  <br />/** <br /> *money在60到100之间，typecolumn和money二列必须存在 <br /> */  <br />$where=array('typeColumn'=>array('$exists'=>true),'money'=>array('$exists'=>true,'$gte'=>60,'$lte'=>100));  <br />$result = $collection->find($where);  <br />

5、分页

<br />> db.books.find().skip(1).limit(1);  //跳过第条，取一条  <br />{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />

这根mysql，limit,offset有点类似，php代码如下：

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

6、排序

<br />> 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   <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />{ "_id" : 1, "title" : "红楼梦", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }  <br />{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }<br />

php代码如下：

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

7、模糊查询

<br />> db.books.find({"title":/城/});      //like '%str%' 糊查询集合中的数据  <br />{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />  <br />> db.books.find({"auther":/^李/});    //like 'str%' 糊查询集合中的数据  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }  <br />  <br />> db.books.find({"auther":/书$/});   //like '%str' 糊查询集合中的数据  <br />{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />  <br />> db.books.find( { "title": { $regex: '城', $options: 'i' } } );   //like '%str%' 糊查询集合中的数据  <br />{ "_id" : 2, "title" : "<em style="color:transparent">本@文来源[email protected]搞@^&代*@码网(</em><q>搞代gaodaima码</q>围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />

php代码如下，按顺序对应的：

<br />$param = array("title" => new MongoRegex('/城/'));  <br />$result = $collection->find($param);  <br />  <br />$param = array("auther" => new MongoRegex('/^李/'));  <br />$result = $collection->find($param);  <br />  <br />$param = array("auther" => new MongoRegex('/书$/'));  <br />$result = $collection->find($param);  <br />

8、$in和$nin

<br />> db.books.find( { money: { $in: [ 20,30,90] } } );   //查找money等于20，30，90的数据  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }  <br />  <br />> db.books.find( { auther: { $in: [ /^李/,/^钱/ ] } } );    //查找以李，钱开头的数据  <br />{ "_id" : 2, "title" : "围城", "auther" : "钱钟书", "typeColumn" : "test", "money" : 56, "code" : 20 }  <br />{ "_id" : 3, "title" : "朝发白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }  <br />{ "_id" : 4, "title" : "将近酒", "auther" : "李白", "money" : 90, "code" : 40 }<br />

php代码如下，按顺序对应的：

<br />$param = array("money" => array('$in'=>array(20,30,90)));  <br />$result = $collection->find($param);  <br />foreach ($result as $id=>$value) {  <br /> var_dump($value);  <br />}  <br />  <br />$param = array("auther" => array('$in'=>array(new MongoRegex('/^李/'),new MongoRegex('/^钱/'))));  <br />$result = $collection->find($param);  <br />foreach ($result as $id=>$value) {  <br /> var_dump($value);  <br />}<br />

9、$or

<br />> db.books.find( { $or: [ { money: 20 }, { money: 80 } ] } );   //查找money等于20，80的数据  <br />{ "_id" : 1, "title" : "红楼梦", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }  <br />

php代码如下：

<br />$param = array('$or'=>array(array("money"=>20),array("money"=>80)));  <br />$result = $collection->find($param);  <br />foreach ($result as $id=>$value) {  <br /> var_dump($value);  <br />}<br />

10、distinct

<br />> db.books.distinct( 'auther' );  <br />[ "曹雪芹", "钱钟书", "李白" ]  <br />  <br />> db.books.distinct( 'auther' , { money: { $gt: 60 } });  <br />[ "曹雪芹", "李白" ]  <br />

php代码如下：

<br />$result = $curDB->command(array("distinct" => "books", "key" => "auther"));  <br />foreach ($result as $id=>$value) {  <br /> var_dump($value);  <br />}  <br />  <br />$where = array("money" => array('$gte' => 60));  <br />$result = $curDB->command(array("distinct" => "books", "key" => "auther", "query" => $where));  <br />foreach ($result as $id=>$value) {  <br /> var_dump($value);  <br />}<br />

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。

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