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Chapter 6 (information system) answer
 

Chapter 6 (information system) answer

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    Chapter 6 (information system) answer Chapter 6 (information system) answer Presentation Transcript

    • Learning area 6: INFORMATION SYSTEMS (FORM 5) DEFINITION: DATA: like raw material, it is not organized and has a little Value. Include text, numbers, images, audio, video. INFORMATION: is organized data that is valuable and Meaningful to a specific user. INFORMATION SYSTEM: is a set of related components that collects Data, processes data and provides information. Collect data Process data Provide Information
    • Usage Of Information System In various Field 1. Education
      • Keep track statistics & grades
      • Help teachers & students in online learning
      • & discussion
      • Store subject content
      2. Business 3. Management
      • carry out online buying & selling
      • help plan the delivery of goods and services
      • make room booking & for checking the best
      • Rates
      • see employee records
      • Analyze products, services & product prices
      • Keep track of product inventory.
    • Information Systems Components Input Process Output
      • Case study : School System
      • Input : students, teachers, textbooks, and teaching facilities.
      • Process: teaching and training
      • Output: Educated students
    • Components Of Information Systems Data Hardware Software Procedures People
    • 5 types of Information System Transaction Processing System (TPS) Expert System (ES) Management Information System (MIS) Decision Support System (DSS) Executive Information System (EIS)
    • Hierarchy Of Data DATABASE Collection of information on specific subjects Can be accessed, updated, stored, retrieved FILE Collection of record. Students record (many students) RECORD Collection of related fields. Students record (1 student) FIELD One or more Characters (byte) Students ID, Name, address BYTE
      • Collection of bits.
      • 8 bits
      Eg: s (01010011) BIT - Represented by 0 & 1 -Smallest unit 0 and 1
    • BIT BYTE FIELD RECORD FILE Binary digit (bit) Electronic charge 0 OFF 1 ON ASCII Symbol 00110000 0 00110001 1 Customer ID Name C001 Ali C002 Ahmad Address Phone no. Engkilili 019-2223333 Lubok Antu 013-5554444 Customer ID Name C001 Ali C002 Ahmad Address Phone no. Engkilili 019-2223333 Lubok Antu 013-5554444 Customer ID Name C001 Ali C002 Ahmad Address Phone no. Engkilili 019-2223333 Lubok Antu 013-5554444
    • Database Is a structured collection of information on specific Subjects. Database Management system Is a program that accesses information from a database. Eg: DBMS, ORACLE, SQL Server, Microsoft access. Meaning of …. Benefits of Using Database Data can be shared Data integrity is assured Information can be accessed easily Minimizes data redundancy
    • Define the meaning of …...
      • Primary key
      • Is a field that uniquely represent each record in a table. These keys must not have null values.
      • each table must have at least one primary key.
      • Foreign key
      • is a field that matches the primary key in another table. It contains same data as those
      • of the primary key in the other table.
      • May have duplicate values.
    • Data Manipulation Data Manipulation refers to the operations of _accessing_, __locating____, _organizing___, _modifying____, and __managing__ data contained in the database.
    • 7 Basic operations of data manipulation Data manipulation Example of statements: 1. update Update the contact number from 03- 78087614 to 03-78088808. 2. Insert Adding record to a database table. 3. Delete Removing record from a database table. 4. Retrieve Retrieve records from a database table. 5. Sort Sorting database. Ascending (A-z) Descending (z-A) 6. Filter Filtering records from a database table. 7. Search Finding records from a database table.
    • Phases of system development
      • Analysis Phase
      • Problem analysis
      • Identify input, process and output
      • Design Phase
      • Design an Entity Relationship Diagram (ERD)
      • Implementation phase
      • Create the database using database software.
      • Testing phase
      • tested by target users. If any errors, developers will
      • fix the error.
      • Documentation phase
      • produce the documents for the program.
      • Maintenance phase
      • provide support and monitoring.