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Info Tech Ch. 7
| Term | Definition |
|---|---|
| Database | A structured set of data held in a computer, usually in a way that is accessible by multiple concurrent users |
| Data Modeling | A way to help programmers and other related parties make sense of database information |
| Operational Data | Data that is produced by an organization's everyday operations. It's gathered in real time to provide a snapshot of what's happening in the present |
| Analytical Data | Historical data that is used to help people make decisions in the present. It's various categories include market data, transactional data, sensor data, natural language, and machine data |
| Database Management System (DBMS) | Software that allows users to define, manipulate, retrieve, and manage data stored in a database. Examples are Microsoft SQL Server, Oracle Database, MySQL, and Microsoft Access |
| Table | A data structure in a relational database that is comprised of fields (columns) and records (rows) |
| Query | A method of asking questions about the data stored in a database |
| Form | A graphical interface that allows users to query a database by filling in information on the form |
| Report | An easy-to-read listing of the results of a query |
| Relational Database | A database that holds data on multiple related tables |
| Field | A single attribute of each record in a table |
| Record | A single instance of an entity stored in a database table |
| Primary Key | A field in a table that uniquely identifies a record |
| Foreign Key | A field that corresponds to the primary key field in another table |
| Normalization | A design technique that organizes data in a database in an optimal way. This results in it being easier to add, remove, and update data without introducing errors |
| Direct Access | A method of accessing a database directly using the database management system itself |
| Query Builder | A method of accessing a database using a graphical user interface that allows users to select what actions they want to perform on a database |
| User Interface Access | A method of accessing a database using forms that allow users to interact with the database |
| Programmatic Access | A method of accessing a database using custom computer programs |
| SQL | A computer language that makes relational databases work |
| Data Definition Language (DDL) | Database commands that change the structure, or schema, of the database |
| Data Manipulation Language (DML) | Database commands that modify the records within the database and not the schema itself |
| Structured Query Language (SQL) | A computer language used by most relational databases for creating queries |
| Structured Data | Data that can be divided into discrete categories |
| Unstructured Data | Data that doesn't follow a clear pattern |
| Semi-Structured Data | Data that has some discrete categories but also other information that doesn't follow a clear pattern |
| Big Data | Extremely large sets of data, usually automatically recorded, that can be analyzed to show insights into human behavior trends |
| Data Extraction | The process of gathering and organizing big data |
| Data Mining | A broad and open-ended analysis of extracted big data |
| Big Data Analytics | The process of asking specific questions to help interpret big data |
| NoSQL | Nonrelational databases that arise from big data |
| Database Administrator | A person who is responsible for designing, maintaining, backing up, and securing an organization's databases |
| Data Scientist | A person who focuses on data analysis, especially as it relates to data mining and big data analytics. These positions require even more advanced programming and analytical skills |
| Database Developer | A person who designs and implements databases, usually by writing SQL code and conducting performance tests to ensure database optimization |
| Data Analyst | A person who specializes in gathering and analyzing data to inform business decisions |