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php中的mongodb select常用操作代碼示例

編輯：PHP綜合

前面說到了mongodb安裝，配置，集群，以及php的插入與更新等，請參考：mongodb。
下面說一下，mongodb select的常用操作

測試數據：
復制代碼代碼如下:
{ "_id" : 1, "title" : "紅樓夢", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }
{ "_id" : 4, "title" : "將近酒", "auther" : "李白", "money" : 90, "code" : 40 }

1、取表條數
復制代碼代碼如下:
> 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代碼如下，按順序對應的：
復制代碼代碼如下:
$collection->count();             //結果：4
$collection->find()->count();     //結果：4
$collection->count(array("auther"=>"李白"));   //結果：2
$collection->find(array("money"=>array('$gt'=>40,'$lte'=>60)))->count();     //結果：1
$collection->count(array("money"=>array('$gt'=>40,'$lte'=>60)));    //結果：1

提示：$gt為大於、$gte為大於等於、$lt為小於、$lte為小於等於、$ne為不等於、$exists不存在、$in指定范圍、$nin指定不在某范圍

2、取單條數據

復制代碼代碼如下:
> db.books.findOne();
{
        "_id" : 1,
        "title" : "紅樓夢",
        "auther" : "曹雪芹",
        "typeColumn" : "test",
        "money" : 80,
        "code" : 10
}

> db.books.findOne({auther: "李白" });
{
        "_id" : 3,
        "title" : "朝發白帝城",
        "auther" : "李白",
        "typeColumn" : "test",
        "money" : 30,
        "code" : 30
}

php代碼如下，按順序對應的
復制代碼代碼如下:
$collection->findOne();
$collection->findOne(array("auther"=>"李白"));

3、find snapshot 游標

復制代碼代碼如下:
> db.books.find( { $query: {auther: "李白" }, $snapshot: true } );
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }
{ "_id" : 4, "title" : "將近酒", "auther" : "李白", "money" : 90, "code" : 40 }

php代碼如下：
復制代碼代碼如下:
/**
* 注意:
* 在我們做了find()操作，獲得 $result 游標之後，這個游標還是動態的.
* 換句話說,在我find()之後,到我的游標循環完成這段時間,如果再有符合條件的記錄被插入到collection,那麼這些記錄也會被$result 獲得.
*/
$result = $collection->find(array("auther"=>"李白"))->snapshot();
foreach ($result as $id => $value) {
var_dump($value);
}

4、自定義列顯示

復制代碼代碼如下:
> db.books.find({},{"money":0,"auther":0}); //money和auther不顯示
{ "_id" : 1, "title" : "紅樓夢", "typeColumn" : "test", "code" : 10 }
{ "_id" : 2, "title" : "圍城", "typeColumn" : "test", "code" : 20 }
{ "_id" : 3, "title" : "朝發白帝城", "typeColumn" : "test", "code" : 30 }
{ "_id" : 4, "title" : "將近酒", "code" : 40 }

> db.books.find({},{"title":1}); //只顯示title列
{ "_id" : 1, "title" : "紅樓夢" }
{ "_id" : 2, "title" : "圍城" }
{ "_id" : 3, "title" : "朝發白帝城" }
{ "_id" : 4, "title" : "將近酒" }

/**
*money在60到100之間，typecolumn和money二列必須存在
*/
> db.books.find({money:{$gt:60,$lte:100}},{"typeColumn":1,"money":1});
{ "_id" : 1, "typeColumn" : "test", "money" : 80 }
{ "_id" : 4, "money" : 90 }

php代碼如下，按順序對應的：

復制代碼代碼如下:
$result = $collection->find()->fields(array("auther"=>false,"money"=>false)); //不顯示auther和money列

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

/**
*money在60到100之間，typecolumn和money二列必須存在
*/
$where=array('typeColumn'=>array('$exists'=>true),'money'=>array('$exists'=>true,'$gte'=>60,'$lte'=>100));
$result = $collection->find($where);

5、分頁

復制代碼代碼如下:
> db.books.find().skip(1).limit(1); //跳過第條，取一條
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }

這根mysql，limit,offset有點類似，php代碼如下：
復制代碼代碼如下:
$result = $collection->find()->limit(1)->skip(1);//跳過 1 條記錄，取出 1條

6、排序

復制代碼代碼如下:
> db.books.find().sort({money:1,code:-1}); //1表示降序 -1表示升序,參數的先後影響排序順序
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }
{ "_id" : 1, "title" : "紅樓夢", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }
{ "_id" : 4, "title" : "將近酒", "auther" : "李白", "money" : 90, "code" : 40 }

php代碼如下：
復制代碼代碼如下:
$result = $collection->find()->sort(array('code'=>1,'money'=>-1));

7、模糊查詢

復制代碼代碼如下:
> db.books.find({"title":/城/});      //like '%str%' 糊查詢集合中的數據
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

> db.books.find({"auther":/^李/});    //like 'str%' 糊查詢集合中的數據
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }
{ "_id" : 4, "title" : "將近酒", "auther" : "李白", "money" : 90, "code" : 40 }

> db.books.find({"auther":/書$/});   //like '%str' 糊查詢集合中的數據
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }

> db.books.find( { "title": { $regex: '城', $options: 'i' } } );   //like '%str%' 糊查詢集合中的數據
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }

php代碼如下，按順序對應的：

復制代碼代碼如下:
$param = array("title" => new MongoRegex('/城/'));
$result = $collection->find($param);

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

$param = array("auther" => new MongoRegex('/書$/'));
$result = $collection->find($param);

8、$in和$nin

復制代碼代碼如下:
> db.books.find( { money: { $in: [ 20,30,90] } } ); //查找money等於20，30，90的數據
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }
{ "_id" : 4, "title" : "將近酒", "auther" : "李白", "money" : 90, "code" : 40 }

> db.books.find( { auther: { $in: [ /^李/,/^錢/ ] } } ); //查找以李，錢開頭的數據
{ "_id" : 2, "title" : "圍城", "auther" : "錢鐘書", "typeColumn" : "test", "money" : 56, "code" : 20 }
{ "_id" : 3, "title" : "朝發白帝城", "auther" : "李白", "typeColumn" : "test", "money" : 30, "code" : 30 }
{ "_id" : 4, "title" : "將近酒", "auther" : "李白", "money" : 90, "code" : 40 }

php代碼如下，按順序對應的：

復制代碼代碼如下:
$param = array("money" => array('$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('/^錢/'))));
$result = $collection->find($param);
foreach ($result as $id=>$value) {
var_dump($value);
}

9、$or

復制代碼代碼如下:
> db.books.find( { $or: [ { money: 20 }, { money: 80 } ] } ); //查找money等於20，80的數據
{ "_id" : 1, "title" : "紅樓夢", "auther" : "曹雪芹", "typeColumn" : "test", "money" : 80, "code" : 10 }

php代碼如下：
復制代碼代碼如下:
$param = array('$or'=>array(array("money"=>20),array("money"=>80)));
$result = $collection->find($param);
foreach ($result as $id=>$value) {
var_dump($value);
}

10、distinct

復制代碼代碼如下:
> db.books.distinct( 'auther' );
[ "曹雪芹", "錢鐘書", "李白" ]

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

php代碼如下：

復制代碼代碼如下:
$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);
}

先寫到這兒，上面只是SELECT的一些常用操作，接下來，還會寫一點。