PHP and SQL Server: Queries IST2101

Project Report 4 SQL Queries Due Sunday, 4/5 at 11:59pm Instructions on how to access team webspace and SQL database have been sent to everyone – Always use team webspace and SQL Server account for the project, not your personal ones! Wednesday’s class: Team discussion on Report 4

Labs We have already announced 6 required labs – HTML basics; PHP basics; IF/ELSE and Loop; HTML form; PHP and SQL Server: Connection; PHP and SQL Server: Queries (case 3a) – The first 6 exercises  5% lab exercise credits We will have several additional lab exercises and they are optional – The first one will be announced today – You can earn bonus points by finishing them – Bonus points might be used to curve the final grade Depends on how far you are from the curving margin Depends on how many extra labs you complete

What we have so far Using PHP to access and query the database and display results on webpage (week11-2) – IST2104

What we have so far Query the database with constraints (week11-3) –

What a cool website looks like Text box Checkboxes Dropdown lists Submit buttons

HTML Form Element Review: Text Fields Text fields are used when you want the user to type letters, numbers, etc. in a form IST2107

HTML Form Element Review: Submit Button When the user clicks the "Submit" button, the content of the form is sent to another file, which is defined by action attribute of the tag IST2108

HTML Form Element Review: Radio Buttons Radio Buttons are used when you want the user to select one of a limited number of choices IST2109 Pick a student (0-4)! Value that will be passed to the process pageValue show on the page

HTML Form Element Review: Checkboxes Checkboxes are used when you want the user to select one or more options of a limited number of choices. IST21010 Pick a student (0-4)!

HTML Form Element Review: Dropdown lists Dropdown lists let the user choose from a set of given options. IST21011 Pick a student (0-4)!

Revisiting priceline.com Text box Checkboxes Dropdown lists Submit buttons

Today’s Topic: Steps to Design PHP Pages to Answer User Queries 1.Query generation – What SQL query do we need to retrieve the desired information? 2.HTML form design – What form element(s) are most suitable for user input in this case? 3.Query processing and result display – How to query the database and display the results using PHP?

Case Study I want a website to show me the information of all projects which are assigned to one or more specific employees User input example: 1 - Mary Jacobs 5 - Heather Jones

Step 1: Query Generation Write SQL query to show the projects which are assigned to employees 1-Mary Jacobs and 5-Heather Jones

Step 1: Query Generation Write SQL query to show the projects which are assigned to employees 1-Mary Jacobs and 5-Heather Jones SELECT * FROM PROJECT WHERE ProjectID IN (SELECT ProjectID FROM ASSIGNMENT WHERE EmployeeNumber IN (1,5));

Step 2: HTML Form Design Is the following design appropriate? I want a website to show me the information of all projects which are assigned to one or more specific employees Problems: 1.Users may not know which employees are in the database 2.Users may not know what information is needed (employee number, or employee name, or both?)

Step 2: HTML Form Design Solution: When possible, give users a list of options to choose from Is the following design appropriate? I want a website to show me the information of all projects which are assigned to one or more specific employees Problem: Selection of more than one employee is not allowed.

Step 2: HTML Form Design Solution: Using checkboxes Is the following design appropriate? I want a website to show me the information of all projects which are assigned to one or more specific employees

Step 2: Code Specification IST21020 case4.php Retrieve the IDs and names of all employees from database Use the “while loop” to generate a checkbox for each employee Name of the array which stores the user’s choices Value that will be passed to the process page Value shown on the webpage

Step 3: Query Processing process_case4.php This is the SQL Query we wrote in Step 1. Employee numbers are obtained from user input

Case 4. Try it yourself Download the case4.php and process_case4.php from course website. Open case4.php and process_case4.php from NotePad++ and add your database information to both files IST21022 Input your own information

Case 4. Try it yourself (cont’d) Visit the php page to query your database – IST21023

In-class Exercise: Case 5 Create PHP webpages to show the information of all employees which are assigned to one or more specific projects –

Step 1: Query Generation Write SQL query to show the employees which are assigned to projects Q3 Portfolio Analysis and Q3 Tax Preparation Execute the query in SQL Management Studio to make sure you retrieve the desired result

Step 2: HTML Form Design Create case5.php in your webspace, copy from case4.php and modify it IST21026 Action to which PHP page?

Step 2: HTML Form Design (cont’d) Modify your case5.php IST21027 Modify this query to retrieve all projects instead of employees Modify these lines to display all the projects using checkboxes

Step 3: Query Processing Create process_case5.php, copy from process_case4.php and modify it IST21028 What ID should you use now? Put the SQL Query you wrote in Step 1 here. The IDs are obtained from user input.

Lab Exercise: Case 6 (Bonus Point) I want a website to show me the assignment information between all employees from one specific department and one or more specific projects I want a website to show me the assignment information between all employees from one specific department and one or more specific projects User input example: Department: Accounting Projects: Q3 Portfolio Analysis Q3 Tax Preparation Corresponding output: