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4 employees Data Type Length NULL Constraints Capable Attribute Employee ID (PK) Numeric Character 15 5,0 N Unique identifier First name N Middle Initial Character 1 Y Last Name Character 15 N Hire Date Date 10 N • If unknown, use current date

4 employees Data Type Length NULL Constraints Capable Attribute Employee ID (PK) Numeric Character 15 5,0 N Unique identifier First name N Middle Initial Character 1 Y Last Name Character 15 N Hire Date Date 10 N • If unknown, use current date

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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4 employees Data Type Length NULL |Сарable| Attribute Constraints Employee ID (PK) Numeric 5,0 N • Unique identifier First name Character 15 N Middle Initial Character 1 Y Last Name Character 15 N • If unknown, use current date • Must be greater than birth date Hire Date Date 10 N Store Location Numeric 2,0 • Must be a valid location Work Department Numeric 4,0 Y • If unknown, use '1000' • Must be a valid department • If unknown, use 'T' • Must be "T', 'J', 'C', or 'M' Job Class Character 1 Y Coach ID Numeric 5,0 Y • Must be a valid employee • Must be less than 92000.00 • Must be greater than commission Salary Numeric 9,2 N Bonus Numeric 7,2 Y • Must have commission or bonus Commission Numeric 7,2 Y • Must have commission or bonus 1. Create the 4 tables and include the constraints 2. Constraint Testing – Test each constraint by listing each constraint and providing a test to validate that each constraint is working: Include an INSERT statement to "force" a а. constraint For example, modify the employee_id so that it is the same as the employee_id in the previous row. This will force a primary key error when the INSERT statement is error. run b. Run the INSERT statement and verify that the error occurred Take a screen shot of the error and insert into the с. constraint testing document d. Move to the next constraint and perform a constraint test
Transcribed Image Text:4 employees Data Type Length NULL |Сарable| Attribute Constraints Employee ID (PK) Numeric 5,0 N • Unique identifier First name Character 15 N Middle Initial Character 1 Y Last Name Character 15 N • If unknown, use current date • Must be greater than birth date Hire Date Date 10 N Store Location Numeric 2,0 • Must be a valid location Work Department Numeric 4,0 Y • If unknown, use '1000' • Must be a valid department • If unknown, use 'T' • Must be "T', 'J', 'C', or 'M' Job Class Character 1 Y Coach ID Numeric 5,0 Y • Must be a valid employee • Must be less than 92000.00 • Must be greater than commission Salary Numeric 9,2 N Bonus Numeric 7,2 Y • Must have commission or bonus Commission Numeric 7,2 Y • Must have commission or bonus 1. Create the 4 tables and include the constraints 2. Constraint Testing – Test each constraint by listing each constraint and providing a test to validate that each constraint is working: Include an INSERT statement to "force" a а. constraint For example, modify the employee_id so that it is the same as the employee_id in the previous row. This will force a primary key error when the INSERT statement is error. run b. Run the INSERT statement and verify that the error occurred Take a screen shot of the error and insert into the с. constraint testing document d. Move to the next constraint and perform a constraint test
1 locations Attribute Data Type Length NULL Capable Constraints Location ID (PK) Numeric Character| 20 2,0 N City N Store Manager Numeric 5,0 Must be a valid employee Y locations data: location_id city store_manager 11 Sarnia null London null Toronto null 22 33 2 locations_departments Attribute Data Type Length NULL Capable Constraints Numeric 2,0 department_id (PK) | Numeric department_manager Numeric location ID (PK) N Must be a valid location 4,0 N Must be a valid department 5,0 Y Must be a valid employee 3 departments Attribute Data Type Length NULL Capable Department ID (PK) Numeric Department name 4,0 N Character 50 N departments data: department_id department_name 1001 IT 1002 Administration Men's Clothing Women's Clothing 1003 1004 1005 Kids 1006 Тoys
Transcribed Image Text:1 locations Attribute Data Type Length NULL Capable Constraints Location ID (PK) Numeric Character| 20 2,0 N City N Store Manager Numeric 5,0 Must be a valid employee Y locations data: location_id city store_manager 11 Sarnia null London null Toronto null 22 33 2 locations_departments Attribute Data Type Length NULL Capable Constraints Numeric 2,0 department_id (PK) | Numeric department_manager Numeric location ID (PK) N Must be a valid location 4,0 N Must be a valid department 5,0 Y Must be a valid employee 3 departments Attribute Data Type Length NULL Capable Department ID (PK) Numeric Department name 4,0 N Character 50 N departments data: department_id department_name 1001 IT 1002 Administration Men's Clothing Women's Clothing 1003 1004 1005 Kids 1006 Тoys
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