Question: For this assignment, you will create Java code that accesses a relational database, requests data, and then analyzes and displays a portion of that data.
For this assignment, you will create Java code that accesses a relational database, requests data, and then analyzes and displays a portion of that data.
Imagine a MySQL relational database schema named COMPANY_DB containing two tables, employee_table and payroll_table, such that the records in each of the tables is as follows:
employee_table:
| Emp id | FName | LNname | Addr | City | State | Zip |
| 100 | Jack | Smith | 123 North | Topeka | KS | 66603 |
| 101 | Joe | Apple | 4 Street | Denver | CO | 80202 |
| 111 | Nancy | Good | 45 SW | Hartford | CT | 06103 |
| 121 | Tom | Whatever | 89 NE | Dover | DE | 19901 |
| 122 | Jim | Thompson | 789 W 95 | Albany | NY | 12207 |
| 123 | Tommy | Boyson | 154 Bolt | Boston | MA | 02201 |
| 125 | John | Jones | 47 West | Lincoln | NE | 68502 |
payroll_table:
| Emp id | Paysch | 401k | Spouse |
| 100 | BiWk | yes | yes |
| 101 | BiWk | yes | yes |
| 111 | Monthly | no | no |
| 121 | Wkly | pending | yes |
| 122 | Wkly | yes | no |
| 123 | Monthly | pending | no |
| 125 | Monthly | no | yes |
The credentials you will need to access the database which holds both of the tables are as follows:
Host string = localhost:3306
Username = student
Password = prg421
Copy and paste the linked Java "starter" code into the NetBeans editor and save as a JAVA file.
Add Java statements to the file to accomplish the following:
Establish a connection to the database
Query the database, joining the two tables on the Emp_id field
Display your name and today's date on the console along with the following returned database results:
employee identification number
first and last name
state
payroll schedule
401k plan
Close the database connection
Identify and correct any compile-time errors that exist in the starter code.
Note: Because you will not be connecting to an actual database, some compiler errors will remain.
Here is the code to edit:
package SQLcommand; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class SQLstarter { public static void main (String[ ] args) { try { // start of the try/catch block of code String host = " "; // This value is provided in the instructions for this assignment. String uName = " "; // This value is provided in the instructions for this assignment. String uPass = " "; // This value is provided in the instructions for this assignment. Connection conn = DriverManager.getConnection(host, uName, uPass); Statement stmt = con.createStatement(); // Select values from the tables String sql = "select Emp id, FName, LName, Addr, City, State, Zip from Employee_table, Union, select Paysch, 401k, Spouse from Payroll-table;"; ResultSet rs = stsmt.executeQuery (sql); // cursor pointing to its current row of data System.out.println ("Displaying student information: "); // display values from the tables String Emp id = rset.getString("Emp id"); String FName = rset.getString("FName "); String LName = rset.getString("LName "); String Addr = rset.getString("Addr "); String Zip = rset.getString("Zip"); String Paysch = rset.getString("Paysch "); String 401k = rset.getString("401k"); String Spouse = rset.getString("Spouse);
// System.out.println (Stu_id + ", " +Stu_Name ); System.out.println (Emp id + ", " +FName + , +LName + , +Add + , +Zip + , +Paysch +, +401k + , +Spouse); } catch ( SQLException err ) { System.out.println( err.getMessage( ) ); } } }
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