Tag: what is (page 2 of 4)

What is an ORDBMS?

ORDBMS stands for Object-Relational Database Management System.

An ORDBMS is a database management system that is a hybrid between the object-oriented model (OODBMS) and the relational model (RDBMS).

Each of those two models has their strengths and weaknesses. By combining the two models, a DBMS can take advantage of various strengths from each model.

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What is an OODBMS?

OODBMS stands for Object-Oriented Database Management System.

An object-oriented database management system (also known simply as an object database) is a DBMS where data is represented in the form of objects, as used in object-oriented programming.

In contrast to relational database management systems (RDBMSs), where data is stored in tables with rows and columns, an object-oriented database stores complex data and relationships between data directly, without mapping to relational rows and columns.

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What is a Data Warehouse?

A data warehouse is a large collection of data that can be used to help an organisation make key business decisions.

Here’s a more precise definition of the term,  as coined by Bill Inmon, (considered by many to be “the father of data warehousing”):

A data warehouse is a subject-oriented, integrated, nonvolatile, and time-variant collection of data in support of management’s decisions.

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What is Big Data?

The term big data refers to the massive amounts of data – both structured and unstructured – that inundate organisations on a day-to-day basis.

Typically, big data is so large, and accumulates so fast, that traditional data storage and processing applications are inadequate.

The big data industry helps organisations capture and analyse their big data, so that those organisations can make more informed business decisions.

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What is a DBMS?

DBMS stands for Database Management System.

A database management system is an application that enables the creation and administration of databases. Database management system is a broad term that includes any system that performs that function.

The most common type of DBMS is an RDBMS (Relational Database Management System). RDBMSs allow you to create relational databases – databases that have multiple tables that contain related data.

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What is the Input Mask Wizard in Microsoft Access?

The Input Mask Wizard is a feature of Microsoft Access that helps you create an input mask.

An input mask allows you to specify exactly how data should be entered into the database. It’s an expression that specifies certain rules about how the data should be formatted as it is entered into the system.

Here’s an example of an input mask:

(999) 000-0000

This specifies the format that a phone number must be entered. The number 9 indicates an optional character. The number 0 specifies a mandatory one. So in this example, the area code is optional.

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What is the Expression Builder in Microsoft Access?

The Expression Builder is a component of Microsoft Access that helps you build expressions. It allows you to look up and build expressions without having to remember how to type the full expression.

Screenshot of the Expression Builder in MS Access 2013.

The Expression Builder in Access 2013.

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What is a Database Schema?

In database terms, a schema (pronounced “skee-muh” or “skee-mah”) is the organisation and structure of a database. Both schemas and schemata can be used as plural forms.

A schema contains schema objects, which could be tablescolumns, data types, views, stored procedures, relationships, primary keys, foreign keys, etc.

A database schema can be represented in a visual diagram, which shows the database objects and their relationship with each other.

Screenshot of a database schema.

A basic schema diagram representing a small three-table database.

Above is a simple example of a schema diagram. It shows three tables, along with their data types, relationships between the tables, as well as their primary keys and foreign keys.

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What is MySQL?

MySQL is an open source relational database management system (RDBMS). It is the world’s most popular open source RDBMS and is currently ranked as the second most popular RDBMS in the world (behind Oracle Database).

MySQL is available as a free download, however, several paid editions are also available which offer additional functionality.

As the name suggests, MySQL is based on SQL. The “My” part is named after co-founder Michael Widenius’ daughter, My.

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What is Microsoft Access?

Microsoft Access is a relational database management system (RDBMS) developed by Microsoft. It’s part of the Microsoft Office suite, included in the Professional and higher editions or sold separately.

Microsoft Access provides a quick and easy way to develop databases and is particularly well suited for individuals and small business. Access is the most popular desktop database on the market.

Screenshot of the Access welcome screen

The Microsoft Access welcome screen allows you to create a database from scratch. You can also search through thousands of templates for a prebuilt database that you can use to get started.

In Access, most tasks can be performed via the graphical user interface (GUI), but more advanced users can also develop applications using Visual Basic for Applications (VBA) code. Advanced users can also use SQL code to write or modify queries.

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