mongodb vs relational database performance

Label:Traditional SQL PagingTraditional SQL paging, all the solutions are almost row_number, for the needs of a variety of sorting, complex query scenarios, Row_number is the killer. In addition, for the current web is very popular Poll/push load paging way, generally use time stamp to achieve paging. These two kinds of paging can be said that the former is universal, even LINQ generated by the paging is row_number, it is conceivable that it is more versatile. The latter is best both in terms of

Tags: database system MongoDBA popular type of non-relational database Mongodb,nosql databaseHigh performance, open source, non-modal document databaseAlternative to traditional relational databases or key/value storage methodsNos

; Next (); }); }); Questionschema.set ( ' Toobject ', {getters: true }); As a result, each time question executes the Save method, the function is called to obtain the most recent ID after the increment. Backup and import of database backup and import of course is necessary, for example, you can take this my backup files directly into the practice, so that the step-by-step creation of the steps are omitted. To back up a

Because Mongodb is not a relational database file, in fact, it does not have the so-called ldquo in traditional relational databases; database rdquo; concept, but don't worry, when you Because Mongodb is not a

database structure, you need to ask yourself a question you will not consider when using a relational database: What is the size of the collection in this relationship? You need to realize that a pair is very few, a couple of many, a couple very much, these subtle differences. In different situations, your modeling will be different.Basics:modeling one-to-fewCou

field in the CSV is by the MongoDB default Fled3 field (Preferably the number of fields in the CSV, the number of field names to be imported, and the amount of field names that match the number of fields, in the same order) 7.MongoDB exported JSON, and then import, do not go in? Because the export JSON will be the primary key _id that is ojbectid, output together, if you import the

About MongoDBMongoDB (from the English word "humongous", the Chinese meaning "huge") is an open-source database that can be applied to businesses of all sizes, industries and applications. As a database for agile development, MongoDB's data schema can be updated flexibly as the application progresses. At the same time, it also provides developers with the functionality of traditional databases: two-level in

larger, or nscanned is much larger than nreturned, it means that the database scans many objects to find the target object, so you need to index the query criteria. When the returned result set is large, i.e. the ResponseLength value is large, the performance is degraded, and a second query parameter is added to the Find query to get only the fields that need to be displayed. 4, explainExecution p