What do you know? In your own words briefly describe what you know about databases? – Where are they used? – What are they used for? – How do they look?
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Post on 24-Dec-2015
Slide 1 What do you know? In your own words briefly describe what you know about databases? Where are they used? What are they used for? How do they look? What parts make up a database? How would you use one for your startup? Slide 1 Slide 2 Database Fundamentals Objective 5.01: Understand database tables used in business Slide 3 What is a Database? A database is a tool used to organize, store, retrieve, and communicate (report on) groups of related information. Slide 3 Slide 4 Examples of Databases 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 Slide 4 Business stock inventory Barcode scanner keeps inventory in database Real estate listings MLS listings online Fingerprint database Slide 5 More Examples of Databases Payroll data Employee names Employee Soc. Security numbers Pay rates Exemptions Hospital/patient data Internet search engines databases iTunes Music Personal address book Student data (NCWISE), such as Student ID #s Slide 5 Slide 6 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. Slide 6 Slide 7 What makes a Database? Slide 7 Databases 4 main Objects : Databases consist of 4 main Objects : 1. Entry- 1. Entry- one piece of information 2. Field 2. Field one category of information 3. Record 3. Record information all about one person or product 4. File 4. File a completed database Slide 8 Tables Tables store data, so they are the essential building blocks of all databases. Tables--are used to group and organize the information within a database. All databases contain at least one table. Each database usually consists of one or more tables. Slide 8 Slide 9 Tables Tables are created in datasheet view First you must set up the database in design view before you can begin. A Table is an arrangement of columns and rows. Slide 9 Slide 10 Tables Slide 10 1. A Table is an arrangement of columns and rows. A Table is the fundamental building block of all databases. In a Database Table: Rows called Records Columns called Fields Slide 11 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. Slide 11 Slide 12 Tables 3. A Field is 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. Slide 12 Slide 13 Tables 4. A Record is a complete description of all of the fields related to one item in a table. A Record A group of related fields of information. Everything on one row is a record. A Record is a single piece of data in a database table. Slide 13 Slide 14 Slide 14 Database Tables: The Big Picture entries 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. 2. ENTRIES (cells) 4. RECORDS (rows) 3. FIELDS (columns) 1.Table 3.Field 2.Entries Record 4. Record Slide 15 Search vs Sort Sort is a way to organize the information in a database Ascending A-Z, 1-100, Shortest to tallest Descending -Z-A, 10-1, Tallest to shortest Search is a way to find something specific. Your answer must meet one or more criteria. Use Connectors to search 2 boolean operators/connectors are: And, Or Searches are also known as filters or queries. Slide 15 Slide 16 Mathematical Comparison Operators < Less Than Greater Than >= Greater than or Equal to Slide 16 Slide 17 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: a) Table b) Record c) Field d) Entry Slide 17 Slide 18 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: a) Table b) Record c) Field d) Entry Slide 18 Slide 19 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: a) Table b) Record c) Field d) Entry Slide 19 Slide 20 What is the answer? Information about multiple employees is classified as a/an: a)Table b)Record c)Field d)Entry Slide 20 Slide 21 Susans Record NameBdaySSStreetCityStZipPhone Almond, Susan 10/22/19 85 245-88- 9845 31 Bessemer St GreensboroNC25233336-585- 5646 Slide 21 One record is displayed from the Employee Table above. The table contains 8 fields.
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