Monday, March 26th
10:45-11:50
Print up a copy or your homework - Big Data Paper 2 Exam Question
On a separate sheet of paper grade your paper using the Paper 2 Rubric.
Follow your teacher's instructions for each section.
Exam TermsData Integrity - Enforcing Referential Integrity
Database Queries and SQL
Complete Database Queries 2007 part 1 & part 2 - get these checked off today.
Begin Datbase Forms - making data entry easier and limiting access to data
Andy Yen: Think your email's private? Think again
Homework
Begin preparing for the DB exam - coming up next week.
Exam Review - use the chapter review in the green book as a starting point to prepare for the exam.
Complete Blown to Bit Chapter 2 Part 2 questions 1-8. Submit your answers to school loop.
What
3.7 Databases
Databases lie at the heart of most IT systems whether in businesses, organizations or other institutions. Databases enable organizations to maintain accurate and comprehensive records. In order to appreciate the role that databases play, the ITGS student must have an understanding of how they work, which can only be gained from the design and creation of basic relational databases as well as by examining how databases are used in specified scenarios (for instance, schools, retail stores, online shopping, online reservations). The increasing use of databases raises a range of social impacts and ethical issues such as the rights of individuals with respect to the storage and potential sale of their personal data or the ease of data mining
and data matching. Students are expected to discuss these issues and, where appropriate, evaluate possible solutions.
Possible scenario
A vet requires information about pet owners and their pets. The ITGS student must be able to develop an original IT solution to meet the vet’s needs. This knowledge should be acquired through a practical activity where the student creates a (minimum) three-table relational database (first normal form only) that uses queries to interrogate the data, forms to enable the easy input and viewing of data, and reports to provide printed information as required.
IT concepts to address in this topic
Database organization
• Table
• Field, data types, key field/primary key, secondary key
• Record
• Flat-file database, relational database, normalization
• Database management system
• Specialized databases: for example, web databases, online encyclopedias
Functions
• Data validation: data types, range check, check digit, field size, input mask, drop-down list
• Queries: for example, searching, sorting, filtering, use of Boolean operators (AND, NOT, OR)
• Data entry form
• Report generation
• Macros
• Transfer of data between databases and other applications
Data storage and access
• Data integrity, reliability, redundancy
• Data matching, data mining
• Database security
Practical database techniques
• Table
• Field, data types, key field/primary key, secondary key
• Record
• Linking tables to create a relational database
• Data maintenance: changing, editing, deleting records
• Queries: for example, searching, sorting, filtering, use of Boolean operators (AND, NOT, OR)
• Data entry form
• Report generation
• Creating and editing simple macros
• Mail merge
Why
Databases lie at the heart of most IT systems whether in businesses, organizations or other institutions.