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Data

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Submitted By JackLiang
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Data - raw facts about things and events
Information - transformed data that has value for decision making

1. Persistent - data that resides on stable storage such as a magnetic disk (does not have to be forever - can be deleted or archived when no longer needed)
2. Shared - multiple uses and multiple users
3. Interrelated - data stored as separate units can be connected to provide a whole picture

Database Management System - DBMS - A collection of components that supports:
1. creation, user, and maintenance of databases
2. data acquisition, dissemination, retrieval, and formatting

Table – a named, two-dimensional arrangement of data. A table consists of two parts: Slide 5 1. heading defining a) table name b) column names
2. body containing rows of data

Structured Query Language - SQL – an industry standard database language that includes statements for database definition, database manipulation, and database control.

Nonprocedural Database Language - a language such as SQL that allows you to specify the parts of a database to access rather than to code a complex procedure and also does not include looping statements

Three Types of SQL Statements
Data Definition Language – DDL – SQL statements for database definition Examples: CREATE TABLE, CREATE VIEW, etc.
Data Manipulation Language – DML – SQL statements for manipulation of data. Examples: SELECT, INSERT, UPDATE, DELETE, etc.
Data Control Language – DCL – SQL statements for database control Examples: GRANT, REVOKE, etc.

Procedural Language Interface – a method to combine a nonprocedural language such as SQL with a programming language such as Java or Visual Basic Examples: JDBC, ODBC, OCI, etc.

Transaction Processing - Reliable and efficient processing of large volumes of repetitive work (DBMSs ensure that simultaneous users do not interfere with each other and that

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