ORM meaning in Database Management ?

Answer:

What is Object Relational Mapping mean?

Object–relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programming technique for converting data between incompatible type systems using object-oriented programming languages. This creates, in effect, a "virtual object database" that can be used from within the programming language. There are both free and commercial packages available that perform object–relational mapping, although some programmers opt to construct their own ORM tools.

In object-oriented programming, data-management tasks act on objects that are almost always non-scalar values. For example, consider an address book entry that represents a single person along with zero or more phone numbers and zero or more addresses. This could be modeled in an object-oriented implementation by a "Person object" with an attribute/field to hold each data item that the entry comprises: the person's name, a list of phone numbers, and a list of addresses. The list of phone numbers would itself contain "PhoneNumber objects" and so on. Each such address-book entry is treated as a single object by the programming language (it can be referenced by a single variable containing a pointer to the object, for instance). Various methods can be associated with the object, such as methods to return the preferred phone number, the home address, and so on.

By contrast, many popular database products such as SQL database management systems (DBMS) are not object-oriented and can only store and manipulate scalar values such as integers and strings organized within tables. The programmer must either convert the object values into groups of simpler values for storage in the database (and convert them back upon retrieval), or only use simple scalar values within the program. Object–relational mapping implements the first approach.

The heart of the problem involves translating the logical representation of the objects into an atomized form that is capable of being stored in the database while preserving the properties of the objects and their relationships so that they can be reloaded as objects when needed. If this storage and retrieval functionality is implemented, the objects are said to be persistent.

reference

Full Form	Category
Organizational Research Methods	Academic & Science
Oak Ridges Moraine	Academic & Science
Northampton	Airport Code
Operating Resource Management	Business
Online Relationship Marketing	Business
Ormonde Mining	Business
Orion Metals Limited	Business
Owens Realty Mortgage	Business
Olympic Resource Management	Business Management
Office of Resolution Management	Business Management
Office of Risk Management	Business Management
Object Relationship Modeling	Computing
Office of Review Management	Computing
Object Reference Model	Computing
Object Role Modeling	Computing
Optically Remote Module	Computing
Object Oriented Routing Model	Computing
Object Recognition Module	Database Management
Object Relational Mapping	Database Management
Other Regulated Material	Electronics
Optimum Resonant Materials	General
Object Role Model	General
Object Relational Mapper	General
OGC Reference Model	General
Observatorio del Roque de los Muchachos	General
O/R mapping	General
Object Relation Mapping	General
Object to Relational Mapping	General
Object Relational Manager	General
Optical Reference Measurement	General
Object Relationship Mapping	General
Online Realtime Magic	General
Ongoing Responsiblity for Medicals	General
Object Relational Model	General
Outside Rearview Mirror	General
Off Road Mode	General
Other Regulated Materials	Governmental
Office of Resource Management	Governmental
Oak Ridges Markham	Governmental
Oject-Relational Mapping	Information Technology
Occupational Risk Management	Jobs
Oral Rehydration Mixture	Medical
Orosomucoid	Medical
Ongoing Responsibility for Medicals	Messaging
Online Reputation Management	Messaging
Operational Risk Management	Military and Defence
Off-route Mine	Military and Defence
Other Reportable Material	Military and Defence
Oromo	Regional
One Rep Max	Sports
Sywell Aerodrome Airport	Transport & Travel