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SQL is relatively easy to learn and allows people to quickly learn how to perform queries on a relational database. This simplicity is part of the reason that relational databases now form the majority of databases to be found.
Basic Terms
An understanding of relational databases requires an understanding of some of the basic terms... displayed 300 characters
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On its own, data means very little. "43156" is an example.
Information is data that is processed to have a meaning. For example, "43156" is the population of the town of Littlewood.
A database is a collection of tables.
Each table contains records, which are the horizontal rows in the table. These are also called tuples... displayed next 300 characters
Since all of the computers used in our security division are personal computers, it only seems logical to implement a relational database in order to manage our critical and sensitive security data...
Another benefit associated with consulting with a DBA is other suggestions about setting up the DBMS with the capabilities for growth and expansion that could prevent disaster should the company grow beyond the current setup and resources...
The queries can ten be run against this. It has been claimed that for complex queries OLAP can produce a result in around 0.1% of the time for the same query on relational data...
Tables store information about entities. Entities have characteristics called attributes. Each row in a table represents a single entity: each row is a set of attribute values and every row must be unique, identified by a primary key (an attribute or set of attributes whose values are unique for every row in the table)...
The Information Age has changed the Information Systems industry by making most tasks that would normally require expert knowledge user friendly. Mrs. Linda Feliciano describes how she has seen database software develop over the past 20 years:
"I started working with databases in 1985, while working in an MI Brigade Automation Center...
To build an effective and efficient application in the relational model, the developer must have a comprehensive knowledge of the tables, and any relationships among them...
SQL is relatively easy to learn and allows people to quickly learn how to perform queries on a relational database. This simplicity is part of the reason that relational databases now form the majority of databases to be found...
