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![What's about functions ? var myCursor = db.inventory.find( { type: 'food' } ); myCursor.forEach(printjson); var myCursor = db.inventory.find( { type: 'food' } ); var documentArray = myCursor.toArray(); var myDocument = documentArray[3]; Query Analysis db.inventory.find( { type: 'food' } ).explain() Output Here](https://image.slidesharecdn.com/introductiontonosqldatabase-140216074500-phpapp02/75/Introduction-to-NoSQL-Database-12-2048.jpg)
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Introduction to NoSQL Database
NoSQL databases were created to handle large and growing datasets for web applications. They are non-tabular, distributed, open source, and designed for high performance, scalability, and availability. The document focuses on key characteristics of NoSQL like schema flexibility, horizontal scaling, and the BASE consistency model. It also covers major NoSQL types (key-value, document, and column-oriented), queries, and compares NoSQL to SQL databases in terms of features, performance, and cost.
Introduction to NoSQL Database
- 1. Introduction to NoSQLDatabase Mohammad Al Ghanem Senior Software Engineer
- 2. Outline Introduction ToNoSQL. Web Application Data growth. Characteristic of NoSQL. ACID. BASE. CAP Theory. Major NoSQL Types. Developers Viewpoint. Look at Queries syntax. NoSQL Shells. Summary. Questions.
- 3. Introduction to NoSQL Stands for Not Only SQL. The idea of NoSQL founded in 1998 with term lightweightSchemaLess by Carlo Strozzi. Open source database. NoSQL will be the future database. Very compatible with distributed systems. Lower cost. High performance database. Founded to handle huge data space. Used by Facebook , Google , Wikipedia …
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- 5. Characteristic of NoSQL Large data volumes. Scalable replication and distribution (Horizontal scaling). Queries need to return answers quickly. Asynchronous Inserts & Updates. Schema-less. Designed to support Caching without 3-rd party tools. ACID transaction properties are not needed. BASE here. CAP Theorem. No Joins statement. No complicated Relationships Less administration time(less cost).
- 6. ACID Atomic –All transaction completes (commit) or none of it completes. Consistent – Consistency is defined in terms of constraints. Isolated – The transaction will behave as if it is the only operation being performed upon the database Durable – Upon completion of the transaction, the operation will not be reversed.
- 7. BASE Basically Available. Soft state(expiration of information). Eventually Consistent. Weak consistency. Availability first. Simpler and faster.
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- 9. Major NoSQL Types Key-Value Store. Hashing. Basic get/put/delete. Crazy fast because there is key to get set of values. Document Store. JSON,XML … document structured. No Join.(handle it in your code). Column Database. Each storage block contains data from only one column. Reduce access and scanning time. Still use tables without joins statements. Better for data analytics.
- 10. Developers Viewpoint ! SQLis better ? Natural reaction. Everyone's experience. Fear of change. NoSQL Will : Simplify your data model. Easy to install. your bugs will be fewer and easier to find. Lower administration / less DBAs. performance is going to be awesome. Scale will be much simpler. Rapid Development. Large binary objects. Graphs/relationships.
- 11. Look at Queriessyntax db.inventory.find( { type: "snacks" } ); db.inventory.find( { type: 'food', price: { $lt: 9.95 } } ); db.inventory.find( { producer: { company: 'ABC123', address: '123 Street' } } ); db.inventory.find( { memos: { $elemMatch: { memo : 'on time', by: 'shipping' } } } ); db.inventory.insert( { _id: 10, type: "misc", item: "card", qty: 15 } ); db.users.remove( { status: "D" } ) db.users.insert( { name: "sue", age: 26, status: "A" } ) db.users.update( { age: { $gt: 18 } }, { $set: { status: "A" } }, { multi: true } ) db.inventory.save( { type: "book", item: "notebook", qty: 40 } )
- 12. What's about functions? var myCursor = db.inventory.find( { type: 'food' } ); myCursor.forEach(printjson); var myCursor = db.inventory.find( { type: 'food' } ); var documentArray = myCursor.toArray(); var myDocument = documentArray[3]; Query Analysis db.inventory.find( { type: 'food' } ).explain() Output Here
- 13. Summary NoSQL : Handlehuge data. High availability with small cost. More data redundancy. High performance. Less administration time. Less standards. SQL : Good to solve ACID problems. Expensive. Less data redundancy. Increasing availability mean increasing cost. More standards. More administration. Pick the right tool for your job !
- 14. Thanks for yourattention Questions ?
Editor's Notes
- #8 Soft state : Data may be time-dependent on user interaction with possible expiration after a period of time. The data must be updated or accessed to remain relevant in the system.