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Preview: About.com Databases: Most Popular Articles

About.com Databases: Most Popular Articles



These articles are the most popular over the last month.



Published: Sat, 10 Dec 2016 11:12:25 +0000

 



The Basics of Normalizing a Database

2016-12-10T11:12:25Z

Database normalization can save storage space and ensure the consistency of your data. Learn the basics in this introductory article.



Basic Keys That Make Database Management Easy

2016-12-10T11:12:25Z

As you may already know, databases use tables to organize information. Each table consists of a number of rows, each of which corresponds to a single database record. So, how do databases keep all of these records straight? It’s through the use of keys.



If you Think You're a Dummy, Learn the Basics...

2016-12-10T11:12:25Z

Think you're a database dummy? This article discusses basic database concepts, including the structure of a database and typical database programs.



Here's What 'Referential Integrity' Is in a...

2016-12-10T11:12:25Z

Referential integrity is a database concept that ensures that relationships between tables remain consistent. Find more information here.



Foreign Keys in Microsoft SQL Server

2016-12-10T11:12:25Z

One of the most important concepts in databases is creating relationships between database tables. These relationships provide a mechanism for linking data stored in multiple tables and retrieving it in an efficient fashion. In order to create a link between two tables, you must specify a foreign key in one table that references a column in another table.



Understanding 'Facts' and 'Dimensions' Tables...

2016-12-10T11:12:25Z

Facts and dimensions form the core of any business intelligence effort. In this article, we look at the development and use of facts and dimensions.



SQL Server Constraints

2016-12-10T11:12:25Z

SQL Server constraints allow you to enforce rules in your database. These rules may affect business logic, database integrity and/or table structures. Each one plays an important role in your database architecture.



Database 101: What is a Primary Key?

2016-12-10T11:12:25Z

What is a primary key? What is it for and how is it used? This article provides a definition of the term as well as examples.



A Quick Guide to Understanding Database...

2016-12-10T11:12:25Z

Database dependencies are a topic that often confuses both students and database professionals alike. Fortunately, they are not that complicated.



Introduction to SQL

2016-12-10T11:12:25Z

The Structured Query Language (SQL) is the language of databases. All modern relational databases, including Access, FileMaker Pro, Microsoft SQL Server and Oracle use SQL as their basic building block. In fact, it’s often the only way that you can truly interact with the database itself.



How to Put a Database in Second Normal Form (2NF)

2016-12-10T11:12:25Z

Second Normal Form allows you to enhance the normalization of your database. In this article, we explore the requirements of 2NF and the process of normalizing your database.



Understanding Structured Query Language (SQL)...

2016-12-10T11:12:25Z

Most large-scale databases use the Structured Query Language (SQL) to define all user and administrator interactions. This language offers a flexible interface for databases of all shapes and sizes.



Answers to Common Structured Query Language...

2016-12-10T11:12:25Z

Looking for advice on using the Structured Query Language? The About Databases SQL FAQ provides answers to the most frequently asked questions about SQL and databases.



Database Terms You Need to Know

2016-12-10T11:12:25Z

Glossary of database terms used commonly in many database management systems.



Reports in Microsoft Access 2013

2016-12-10T11:12:25Z

Microsoft Access 2013 allows you to easily create professionally formatted reports automatically from information stored in a database. In tis tutorial, we're going to design a nicely-formatted listing of employee home telephone numbers for the use of management using the Northwind sample database and Access 2013.



5 Things Beginners Need to Know About Databases

2016-12-10T11:12:25Z

Just getting started with databases? Here's a rundown of the top things that I wish I knew before I got started in the field. These facts are guaranteed to make your life easier!



How To Back Up a Microsoft Access Database

2016-12-10T11:12:25Z

Backing up your Microsoft Access databases is an important part of protecting your critical data. In this tutorial, we walk through the process of backing up an Access database, step-by-ste.



What is SQL?

2016-12-10T11:12:25Z

The Structured Query Language (SQL) is the set of instructions used to interact with a relational database. In fact, SQL is the only language that most databases actually understand. Whenever you interact with such a database, the software translates your commands (whether they are mouse clicks or form entries) into SQL statement that the database knows how to interpret.



How to Choose a Primary Key for Your Database,...

2016-12-10T11:12:25Z

Choose your database's primary keys carefully, ensuring they are unique and will never need to be changed. A bad choice is a ZIP code or Social Security number.



Microsoft Access 2013 Fundamentals

2016-12-10T11:12:25Z

Are you overwhelmed by the large quantities of data that need to be tracked in your organization? Perhaps you're currently using a paper filing system, text documents or a spreadsheet to keep track of your critical information. If you're searching for a more flexible data management system, a database might be just the salvation you're looking for and Microsoft Access 2013 provides an excellent option.



A Quick Guide to Database Normalizing with...

2016-12-10T11:12:25Z

In this article, we begin our look at the first of three major normal forms -- first normal form (otherwise known as 1NF).



Building an Access Database in Office 365

2016-12-10T11:12:25Z

Looking for an easy way to move your Microsoft Access database to the cloud? Microsoft's Office 365 service provides a central location.



How to Retrieve Data with SQL Queries: SELECT...

2016-12-10T11:12:25Z

Learn to retrieve information from your database with the SQL SELECT statement.



4 Types of Database Relationships

2016-12-10T11:12:25Z

Relationships allow you to describe the connections between different database tables in a relational database in powerful ways.



Use the Northwind Sample Database to Learn...

2016-12-10T11:12:25Z

Install the Northwind sample database for Microsoft Access 2013. This database contains some great sample tables, queries, reports and other database features useful for learning Access.



The Top 6 Books Every SQL Enthusiast Should Read

2016-12-10T11:12:25Z

Looking for a book to help you get started with Structured​ Query Language? Need a new reference book for your shelf? Check out my favorite SQL books.



Importing and Exporting Data With SQL Server 2014

2016-12-10T11:12:25Z

The SQL Server Import and Export Wizard is a component of SQL Server Integration Services (SSIS) that facilitates the transfer of information between your SQL Server databases and other data sources, including Microsoft Excel, Microsoft Access and flat files.



How the ACID Model Ensures Your Data is Safe

2016-12-10T11:12:25Z

Database management systems ensure data integrity through the ACID protocol: Atomicity, Consistency, Isolation and Durability.



Microsoft Access Databases in Office 365

2016-12-10T11:12:25Z

With the release of Microsoft Office 365 in 2013, there were a number of questions about how it changed the different Microsoft programs, including Microsoft Access.



The Fundamental Guide to SQL (Structured Query...

2016-12-10T11:12:25Z

Would you like to learn SQL? This tutorial will introduce you to the basics.



How To Install the Northwind Sample Database

2016-12-10T11:12:25Z

The Northwind database contains some great sample tables, queries, reports and other database features. Here's how to install it.



Learn how to use criteria in Microsoft Access...

2016-12-10T11:12:25Z

Are you familiar with the use of criteria in queries? They can help you limit results in interesting ways!



How to Choose a User Friendly Database for Your...

2016-12-10T11:12:25Z

Do a careful needs analysis before you dive in and commit to a database solution. Learn the difference between desktop and server databases.



Compatibility between Access formats ACCDB and...

2016-12-10T11:12:25Z

The ACCDB Access file format has been the default Access file format since its 2007 release. Learn its benefits and how to convert between it and the older format, MDB.



How to Select Data Within Ranges in SQL...

2016-12-10T11:12:25Z

The Structured Query Language (SQL)provides database users with the ability to create customized queries to extract information from databases. In an earlier article, we explored extracting information from a database using SQL SELECT queries. Let's expand upon that discussion and explore how you can perform advanced queries to retrieve data that matches specific conditions.



How to Build a New Access Database in SQL

2016-12-10T11:12:25Z

In this series of Microsoft Access tutorials, we follow the database admins for Patrick's Widgets as they build a Microsoft Access database.



How To Create a Genealogy Database in Microsoft...

2016-12-10T11:12:25Z

Are you interested in tracing your family roots but don’t have a good place to store all of your genealogical information? While there are several full-featured family tree software packages on the market, you can also use a free Microsoft Access template to create your own genealogy database on your computer. Microsoft’s already done most of the work for you, so there is no programming knowledge needed to get started.



A Beginner's Guide to 'Data Mining'

2016-12-10T11:12:25Z

Data mining allows you to find the needles hidden in your haystacks of data. Learn how to use these advanced techniques to meet your business objectives.



How To Print Mailing Labels in Microsoft Access...

2016-12-10T11:12:25Z

One of the most common uses of a database is generating mass mailings. In this tutorial, we examine the process of creating mailing labels using Microsoft Access 2013 using the built-in Label Wizard.



Metadata is following you, everywhere you go.

2016-12-10T11:12:25Z

With this metadata definition, find out how metadata describes data itself and is used in almost every industry.



How to Create User Accounts in SQL Server 2014

2016-12-10T11:12:25Z

SQL Server 2014 provides a wide range of security features designed to help you protect the confidentiality, integrity and availability of data stored in your enterprise databases. One of the most important tasks that database administrators perform is the implementation of role-based access control that limits the ability of users to retrieve and modify data in the database unless they have an explicit business need to do so.



The Quick Way to Import and Export SQL Server...

2016-12-10T11:12:25Z

The bulk copy (bcp) command of Microsoft SQL Server provides you with the ability to insert large numbers of records directly from the command line.



Query Your Database to Get the Best of It

2016-12-10T11:12:25Z

Find out how a database query can get the data you need out of your database by writing the query in the language the database requires, usually SQL.



Learn the Fundamentals of Microsoft Access

2016-12-10T11:12:25Z

Want to learn how to use Microsoft Access? Find out about the fundamentals with this introduction.



How a Database Domain Protects your Data's...

2016-12-10T11:12:25Z

Find out how defining a database domain ensures your data's integrity, which ensures that all data in a field contains valid values.



Read about These Top 5 Databases, Both Free and...

2016-12-10T11:12:25Z

Desktop databases offer simple, flexible solutions for data storage and retrieval. Here's a rundown on the five top desktop databases for individuals and businesses.



How Third Normal Form Helps Ensure Data Accuracy

2016-12-10T11:12:25Z

In our first article, we looked at the basic requirements of 3NF. Here they are again to refresh your memory: meet the requirements of 1NF and 2NF and remove columns that are not fully dependent upon the primary key.



Abandoning ACID in Favor of BASE

2016-12-10T11:12:25Z

The BASE model offers a completely different alternative to our traditional notions of database engineering. It abandons the relational database guiding principles of atomicity, consistency, isolation and durability in favor of a relaxed approach that allows the flexible, efficient storage of data.



How To Create a Trace with SQL Server Profiler

2016-12-10T11:12:25Z

Traces allow you to track the specific actions performed against a SQL Server databases. They provide valuable information for troubleshooting database issues and tuning database engine performance. In this tutorial, we walk through the process of creating a SQL Server Trace with SQL Server Profiler, step-by-step.



How to Encrypt Your Access 2013 Database

2016-12-10T11:12:25Z

Password protecting an Access database allows you to protect your sensitive data from prying eyes. Encrypted databases require a password to open. Users attempting to open the database without the correct password will be denied access. Additionally, users attempting to directly access the database’s ACCDB file will not be able to view any of the data contained within it, as the encryption obscures the data from view by those without the proper password.



Multivalued Dependency

2016-12-10T11:12:25Z

What is a multivalued dependency? Find out here!



Retreiving Data with the SELECT Statement

2016-12-10T11:12:25Z

The SELECT command is the most commonly used command in SQL. It allows database users to retrieve the specific information they desire from an operational database.



Migrating to SQL Server with the Access...

2016-12-10T11:12:25Z

Many database users begin their adventure in the world of databases by creating a Microsoft Access database that meets the basic requirements of their organizations. Often, this is a dramatic improvement from an unwieldy collection of spreadsheets, text files or other documents that the organization previously used to manage information. However, eventually the business may outgrow that Access database and need to make the move to a more advanced database product.



Protect your Data by Normalizing it to at Least...

2016-12-10T11:12:25Z

What is a full functional dependency? Find out here!



How to Convert an Access Database to SQL Server...

2016-12-10T11:12:25Z

Is your Access database growing too large or unwieldy? Perhaps you need to allow more robust multiuser access to the database? Converting your Access database to Microsoft SQL Server might be the solution you’re trying to find. Fortunately, Microsoft provides an Upsizing Wizard in Access that makes it easy to convert your database. In this tutorial, we walk through the process of converting your database.



Designing a database? Give your tables some...

2016-12-10T11:12:25Z

A database attribute is a column, or field, in a database table. For example, given a Customers table, a Name column is an attribute of that table.



Control Access Permission to Your Database...

2016-12-10T11:12:25Z

The Data Control Language (DCL) is a subset of the Structured Query Lanaguge (SQL) that allows database administrators to configure security access to relational databases.



Database Relationships in Access 2013

2016-12-10T11:12:25Z

So you've made the move from a spreadsheet to a database. You've set up your tables and painstakingly transferred all of your precious data. You take a well-deserved break, sit back and look at the tables you've created. Wait a second -- they look strangely familiar to the spreadsheets you've just disowned. Did you just reinvent the wheel? What's the difference between a spreadsheet and a database anyway?



Microsoft Access can help your small business...

2016-12-10T11:12:25Z

Learn five ways that Microsoft Access databases can help your small business succeed!



Ditch Your Spreadsheet for a Database to Access...

2016-12-10T11:12:25Z

Databases offer an organized mechanism for storing, managing and retrieving information. Far more powerful than spreadsheets, a database and a Database Management System can help manage and protect large amounts of data.



How to Create a Simple Query in Microsoft Access

2016-12-10T11:12:25Z

Learn how to create a simple query in Microsoft Access.



Copying Tables in Microsoft Access 2013

2016-12-10T11:12:25Z

Copying tables in Microsoft Access can be tricky, not because it is particularly difficult, but because there are a number of things you need to consider before you begin. Naturally, there are a lot of things you need to avoid as well, because having two copies of the same table will significantly skew your data.



Table tweaking: Three basic techniques every...

2016-12-10T11:12:25Z

Although copying, renaming or deleting tables remains a straightforward process in Microsoft Access, you'd be wise to copy your database before you adjust its internal structure.



Printing Query Results in Access 2013

2016-12-10T11:12:25Z

Access offers users a way to print queries and their results. This provides users with a way to later review the results if they cannot remember which query was used.



Relationships are the Basis for Relational...

2016-12-10T11:12:25Z

Understand the definition of a database relationship, which is behind all relational databases.



Choose the Best Database Software to Meet Your...

2016-12-10T11:12:25Z

Database software comes in all flavors. Here's a brief rundown on some of the primary desktop or server-based database software solutions.



A Foreign Key Opens the Door to a Whole World...

2016-12-10T11:12:25Z

Here, we define a database foriegn key and provide examples for understanding its relationship to a table's primary key.



How to Choose an SQL Server Authentication Mode

2016-12-10T11:12:25Z

Microsoft SQL Server 2008 offers administrators two choices of performing user authentication: Windows authentication mode and mixed authentication mode. Making the proper choice affects both the security and maintenance of your organization’s databases.



Databases for Marketing Professionals

2016-12-10T11:12:25Z

As a marketing professional you already deal with so many apps and software packages you are probably wondering why you should have to deal with something that is designed specifically for databases. After all, you probably already have a number of Excel spreadsheets to handle calculations, contacts and email templates in your preferred email software, and marketing campaigns recorded in a third program. This is exactly why you can benefit from an app or program that offers the organization of a database; it provides a centralized program to keep all of your information current from a single location instead of needing all of the different apps and programs.



Spreadsheets vs. Databases: What's the...

2016-12-10T11:12:25Z

Should you use a spreadsheet or a database? Learn more in this article!



How to Create Database Relationships in Access

2016-12-10T11:12:25Z

Join us as we walk through the process of creating database relationships in Microsoft Access.



Keep your data harmonious with Access 2013...

2016-12-10T11:12:25Z

Input masks in Microsoft Access 2013 restrict user input, preventing users from entering data in a form that doesn't meet your quality requirements.



Database Design from the Ground Up

2016-12-10T11:12:25Z

In this course, we explore the basics of database design. Ten weekly lessons each explore a different issue in database design, culminating in a final case study.



Filtering Data in Access 2013

2016-12-10T11:12:25Z

Microsoft Access 2013 includes filters that pull specific information instead of users having to muddle through countless records.



Free Downloadable Geography Database for...

2016-12-10T11:12:25Z

This Microsoft Access sample database provides tables containing information on the world's countries, cities and provinces. It is used to illustrate examples for a number of the articles on the About Databases site and also provides a good sample for students, professionals and others who are learning Microsoft Access.



What is a Candidate Key?

2016-12-10T11:12:25Z

What is a Candidate Key? Find out here!



How to Retrieve Data from Multiple Tables with...

2016-12-10T11:12:25Z

Learn to retrieve information from your database with the SQL SELECT statement.



Printing Forms in Microsoft Access

2016-12-10T11:12:25Z

While forms are most useful when accessed directly in the database, there will be times when you will want to print them, for example when you want details about a single record or if you want to create instructions and include screenshots for entering data into a form.



k-means Clustering

2016-12-10T11:12:25Z

k-means clustering is a data mining/machine learning algorithm used to cluster observations into groups of related observations without any prior knowledge of those relationships. The k-means algorithm is one of the simplest clustering techniques and it is commonly used in medical imaging, biometrics and related fields.



A Quick Guide to Using Recovery Models in SQL...

2016-12-10T11:12:25Z

SQL Server provides three different recovery models that allow you to specify the way SQL Server manages log files and prepares your enterprise for a disaster. Each of these models represents a different approach to balancing the tradeoff between conserving disk space and providing for granular disaster recovery options.



Everything You Need to Know to Start a Career...

2016-12-10T11:12:25Z

Looking for a job in the database field? This article provides the advice you need to get started.



How a Database Management System Works

2016-12-10T11:12:25Z

A database management system allows a computer to perform database functions of storing, retrieving, adding, deleting and modifying data.



A Database Relation Might not be What You Think

2016-12-10T11:12:25Z

A database relation is the same as a database table, and is governed by a series of constraints that ensure data integrity.



Queries Using Multiple Tables in Access 2013

2016-12-10T11:12:25Z

One of the primary benefits of using Microsoft Access is having the ability to pull data regardless of where it is saved within the database, especially if it is spread over half a dozen tables.



Database Certifications to Kick Start your Career

2016-12-10T11:12:25Z

Database certifications from major database vendors including Microsoft, Oracle, MySQL and IBM.



Creating Databases for Dry Cleaners

2016-12-10T11:12:25Z

At first it may seem that dry cleaners don’t need databases, but if you have been in the business a while, you know exactly why they are vital to the industry.



What Data Mining Classification Has to do with...

2016-12-10T11:12:25Z

Classification is a data mining technique that helps analyze data and predict outcomes. It is one of several such methods used to analyze big data.



How to Understand an Entity-Relationship Diagram

2016-12-10T11:12:25Z

An entity-relationship (ER) diagram is a specialized graphic that illustrates the relationships between entities in a database.



Getting Started in Microsoft Access Reports

2016-12-10T11:12:25Z

Would you like to create professional-looking reports from your Microsoft Access database with the click of a mouse? Follow along as we walk through the simple process of designing a reusable report.



Understand the Difference Between a Database...

2016-12-10T11:12:25Z

A database instance is the entire database environment, but vendors may use the term in a specific way.



Transitive Dependencies Can Creep Into Your...

2016-12-10T11:12:25Z

A transitive dependency in a database is an indirect relationship between values in the same table that causes a functional dependency and thus results in de-normalization.



Trivial Functional Dependency

2016-12-10T11:12:25Z

The definition of trivial functional dependency in relational database theory, along with an example and some further reading.



How To View and Edit SQL in Microsoft Access

2016-12-10T11:12:25Z

Editing the raw SQL powering a Microsoft Office query is straightforward -- and Access conforms well to ANSI-standard SQL syntax.



How to Modify a Query in Microsoft Access

2016-12-10T11:12:25Z

Want to learn how to modify a query in Microsoft Access? This is the help you need.



How To Compact and Repair an Access 2013 Database

2016-12-10T11:12:25Z

Over time, Microsoft Access databases grow in size and unnecessarily use disk space. Additionally, repeated modifications to the database file may result in data corruption. Therefore, it's a good idea to periodically run the compact and repair database tool to ensure the consistency of your data.



Ensure Accurate Data Using Functional...

2016-12-10T11:12:25Z

What is a functional dependency in a database? Find out why FC is important in ensuring the accuracy of your data.



Break a Rule: Sometimes It's OK To Denormalize...

2016-12-10T11:12:25Z

Database normalization is a basic tenet of database application development, but it's not always absolutely necessary. Here's a look at when you might not need to normalize.



How to Create Data Input Forms for Your Database

2016-12-10T11:12:25Z

Part 7 of our tutorial introduces you to the concept of Access forms to input and modify data.



How to Create Entity-Relationship Diagrams

2016-12-10T11:12:25Z

Entity Relationship diagrams provide database designers with a valuable tool for modeling the relationships between database entities in a clear, precise format. Learn how to create basic diagrams for your databases with this guide.



How to Convert Excel Spreadsheets into Access...

2016-12-10T11:12:25Z

Let us walk you through the process of converting your Excel spreadsheet to a flexible Access 2013 database.