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Database Fundamentals

Database Fundamentals. Objective 5.01: Understand database tables used in business. What is a Database ?. A database is a tool used to organize, store, retrieve, and communicate (report on) groups of related information. Examples of Databases. Business stock inventory

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Database Fundamentals

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  1. DatabaseFundamentals Objective 5.01: Understand database tables used in business

  2. What is a Database? A database is a tool used to organize, store, retrieve, and communicate (report on) groups of related information.

  3. Examples of Databases • Business stock inventory • Barcode scanner keeps inventory in database • Real estate listings • MLS listings online • Fingerprint database • Telephone book • Online library card catalog • Media Center information • Encyclopedias • Dictionaries • eBay and other online businesses • Inventory • Keep track of customers, products, vendors, pay pal accounts

  4. More Examples of Databases • Payroll data • Employee names • Employee SSN • Pay rates • Exemptions • Hospital/patient data • Internet search engines databases • iTunes • Music • Personal address book • Student data (PowerSchool), such as Student ID #’s

  5. Why do businesses use databases? • A database is a tool used by businesses to manage the huge amount of data required to run the business. • For example, a business may use several databases to keep track of employee information, customers, products, and prices of products. • All of the information can be easily and efficiently managed and shared by database software.

  6. What makes a Database? • Databasesconsist of 4 main Objects: • Tables - store data in rows and columns • Queries - retrieve and process data • Forms- control data entry and data views • A form is a customized manner of inputting data into a database or presenting data on a screen. • Reports - summarize and print data

  7. Tables Tablesstore data, so they are the essential building blocks of all databases. Tablesare used to group and organize the information within a database. All databases contain at least one table. • Eachdatabaseusually consists of one or more tables.

  8. Tables All databases should have a separate table for every major subject, such as employee records or customer orders. Tables organize data. Data should not be duplicated in multiple tables.

  9. Tables • 1. A Table is an arrangement of columns and rows. • A Tableis the fundamental building block of all databases. • In a Database Table: • Rowscalled Records • Columnscalled Fields

  10. Table Components: Entry, Field, Record 2. An Entry is a single piece of data in a database table. • Data is made up of characters. • Data is typed into a Field as an entry. • Example: • Beverages is an entry in the Category Name field.

  11. Tables 3. A Fieldis a grouping or category of similar information contained in a table. • A Field is represented by a COLUMN. • It is comprised of entries. • A Field is a unique identifier for a category of information. • It is one item or bit of information in a record.

  12. Tables 4. A Recordis a complete description of all of the fields related to one item in a table. • A Record – A group of relatedfields of information. • Everything on one row is a record. • A Record is a single piece of data in a databasetable.

  13. Database Tables:The Big Picture • Table • Entries • Field 4. Record 3. FIELDS (columns) 4. RECORDS (rows) 2. ENTRIES(cells) To calculate the number of entries in a database--multiply the number of fields by the number of records. Ex. 5 fields (columns) * 26 rows (records) = 130 entries in this database.

  14. What is the answer? • Name • Birth date • Social Security No. • Street • City • State • Zip • Phone Each item on the left is classified as a/an: • Table • Record • Field • Entry

  15. What is the answer? • Susan Almond • 10/22/1985 • 245-88-9845 • 31 Bessemer St. • Greensboro • NC • 25233 • 336-585-5646 Each item on the left is classified as a/an: • Table • Record • Field • Entry

  16. What is the answer? • Susan Almond • 10/22/1985 • 245-88-9845 • 31 Bessemer St. • Greensboro • NC • 25233 • 336-585-5646 All of the information about Susan Almond is classified as a/an: • Table • Record • Field • Entry

  17. What is the answer? • Information about multiple employees is classified as a/an: • Table • Record • Field • Entry

  18. Susan’s Record One record is displayed from the Employee Table above. The table contains 8 fields.

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