mongodb query tool

Common query indexes of mongoDB (III)1. _ id index is the default index created by the vast majority of sets. For each inserted data, MongoDB automatically generates a unique _ id field. > Db. jerome_2.collection.insert ({x: 2}) WriteResult ({"nInserted": 1})> db. jerome_2.collection.getIndexes () [{"v": 1, "key": {"_ id": 1}, "name": "_ id _", "ns ": "jerome. je

In the past-blogs, the topic mainly focus on the high query operation of MongoDB. In this blog, we simply study the regex expression in the mongdb. MongoDB also support the Regex query. For exampleThe expression is also able to combination with other expression.Notes:/^a/; /^a.*/; /^a.*$/has the same result, however th

({"name": {"$not": {"$in": ["Stephen2", "Stephen1"]}}){"_id": ObjectId ("4fd58ecbb9ac507e96276f1a"), "name": "Stephen", "Age": +, "Genda": "Male", "email": "[email protected]" } 3. Query for the null data type:--When a query with null data is made, all values are null and documents that do not contain the specified key are retrieved. > Db.test.find ({"x": null}){"_id": ObjectId ("4FD59D30B9AC507E96276F1B"

invalid, only the entire database can be synchronizedThis bug1.0.3 does not exist before. It appears after 1.4.0 modification. CHANGE Part The incremental synchronization parameter is changed from millisecond to second (All Versions earlier than 1.6.0 are milliseconds ); Improve the incremental synchronization progress display (Other unchanged) in real-time synchronization, remove the progress bar, instead of displaying the oplog lag time. Recovery parameter -- tu, -- tp, that is, specify

Install slightly. It's a personal metropolis.Here is the connection configuration.The main introduction is to create a set of data through Robomongo to achieve two machine data can be quickly migrated, without the shell command to slowly knock.It is mainly to simplify the process of migrating a single table or a small amount of data.1. Create a new collection test.2. Click the Insert.3. A box appears.4. Go to another machine, find the appropriate data source, right-click All copy5. Paste into th

Recently wanted to do a front-end control Interface field return of a basic method, through the MongoDB find ($query, $field) query to specify the fields of the query, but encountered such a problem:There are two encapsulation methods in the work code:/*** Query a record* @p

This article describes a simple php Tutorial on MongoDB operations, including connection, addition, modification, deletion, and query. For more information, see MongoDB. The code is as follows:// Connect to localhost: 27017$ Conn = new Mongo (); // Connect to the default port of the remote host$ Conn = new Mongo ('test. com '); // Connect to Port 22011 of the

. Database username Password The database username and password are empty by default after successful startupPHP Mongod Extended installation Download: http://download.csdn.net/detail/dupingjin/7577217 Select the appropriate extension based on the PHP version, which is used here Php_mongo-1.4.5-5.5-vc11-nts.dllInto PHPDirectory extfolder under Modify PHP.ini To increase at the end of a line or php.ini extension. Extension=php_mongo-1.4.5-5.5-vc11-nts.dllRestart the Php/nginx/apache environme

Previous article, wrote MongoDB General operation, continue to write, this chapter mainly talk about advanced query, text, aggregation, Big Data query.MongoDB has a lot of query syntax and is a richer one in the NoSQL ranks. Of course, there are many queries that cannot be compared with relational queries. For instance, Mongo