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W
if you got any specific questions ask 
I only know a bit, but I have used Eclipse when programming java, and made some GUI's
Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)
how much do you know? (like, do you know how to use JFrame, JPane, different layoutl etc? )
if you are at the basics, start making one file that extends JFrame, and one that extends JPanel that you add to the one extending JFrame and remember to set the visibility and size of both.
I only know a bit, but I have used Eclipse when programming java, and made some GUI's Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)
how much do you know? (like, do you know how to use JFrame, JPane, different layoutl etc? )
if you are at the basics, start making one file that extends JFrame, and one that extends JPanel that you add to the one extending JFrame and remember to set the visibility and size of both.
Last edited:
E
if you got any specific questions ask I only know a bit, but I have used Eclipse when programming java, and made some GUI's
Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)
how much do you know? (like, do you know how to use JFrame, JPane, different layoutl etc? )
if you are at the basics, start making one file that extends JFrame, and one that extends JPanel that you add to the one extending JFrame and remember to set the visibility and size of both.
I only know a bit, but I have used Eclipse when programming java, and made some GUI's Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)
how much do you know? (like, do you know how to use JFrame, JPane, different layoutl etc? )
if you are at the basics, start making one file that extends JFrame, and one that extends JPanel that you add to the one extending JFrame and remember to set the visibility and size of both.
this is the code for the program i mentioned
Code:
import java.util.Scanner;
public class mainclass {
public static void main(String[] args) {
Scanner calendar = new Scanner(System.in);
System.out.println("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together");
System.out.println("Enter sum of all four days:");
int sum = calendar.nextInt();
int day, day2, day3, day4, sum1;
sum1 = sum - 16;
day = sum1 / 4;
System.out.printf("first day is: ");
System.out.println(day );
day2 = day + 1;
System.out.printf("second day is: ");
System.out.println(day2 );
day3 = day + 7;
System.out.printf("third day is: ");
System.out.println(day3 );
day4 = day + 8;
System.out.printf("forth day is: ");
System.out.println(day4 );
}
}
W
for some reason the program I am trying to make will not run, and I cannot be bothered to find out why today but here is one class that might help, plus a modifications of your class:
-----
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class CalendarPanel extends JPanel {
public void CalendarPanel(){
JLabel instructions = new JLabel("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together" +
"\n Enter sum of all four days ");
JTextField input = new JTextField();
add(input);
TestClass calculations = new TestClass();
calculations.calclulate();
// add metod to get results from calculations object
// and print theese to a graphical object
// for now you could use JLabels
int day = calculations.getDay();
JLabel firstday = new JLabel("Day 1" + day);
add(firstday);
}
}
--------
import java.util.Scanner;
public class TestClass {
//public static void main(String[] args) {
private int day, day2, day3, day4, sum1; // ALWAYS decalre variabeles private when possible
Scanner calendar;
public void TestClass(){
calendar = new Scanner(System.in);
}
public void calclulate(){
// System.out.println("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together");
// System.out.println("Enter sum of all four days:");
int sum = calendar.nextInt();
sum1 = sum - 16;
day = sum1 / 4;
// Print to labels or elsewhere
System.out.printf("first day is: ");
System.out.println(day );
day2 = day + 1;
System.out.printf("second day is: ");
System.out.println(day2 );
day3 = day + 7;
System.out.printf("third day is: ");
System.out.println(day3 );
day4 = day + 8;
System.out.printf("forth day is: ");
System.out.println(day4 );
}
public int getDay(){ // Normally "getters" and "setters" are private
return day;
}
}
but here is one class that might help, plus a modifications of your class:-----
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class CalendarPanel extends JPanel {
public void CalendarPanel(){
JLabel instructions = new JLabel("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together" +
"\n Enter sum of all four days ");
JTextField input = new JTextField();
add(input);
TestClass calculations = new TestClass();
calculations.calclulate();
// add metod to get results from calculations object
// and print theese to a graphical object
// for now you could use JLabels
int day = calculations.getDay();
JLabel firstday = new JLabel("Day 1" + day);
add(firstday);
}
}
--------
import java.util.Scanner;
public class TestClass {
//public static void main(String[] args) {
private int day, day2, day3, day4, sum1; // ALWAYS decalre variabeles private when possible
Scanner calendar;
public void TestClass(){
calendar = new Scanner(System.in);
}
public void calclulate(){
// System.out.println("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together");
// System.out.println("Enter sum of all four days:");
int sum = calendar.nextInt();
sum1 = sum - 16;
day = sum1 / 4;
// Print to labels or elsewhere
System.out.printf("first day is: ");
System.out.println(day );
day2 = day + 1;
System.out.printf("second day is: ");
System.out.println(day2 );
day3 = day + 7;
System.out.printf("third day is: ");
System.out.println(day3 );
day4 = day + 8;
System.out.printf("forth day is: ");
System.out.println(day4 );
}
public int getDay(){ // Normally "getters" and "setters" are private
return day;
}
}
E
for some reason the program I am trying to make will not run, and I cannot be bothered to find out why today but here is one class that might help, plus a modifications of your class:
-----
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class CalendarPanel extends JPanel {
public void CalendarPanel(){
JLabel instructions = new JLabel("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together" +
"\n Enter sum of all four days ");
JTextField input = new JTextField();
add(input);
TestClass calculations = new TestClass();
calculations.calclulate();
// add metod to get results from calculations object
// and print theese to a graphical object
// for now you could use JLabels
int day = calculations.getDay();
JLabel firstday = new JLabel("Day 1" + day);
add(firstday);
}
}
--------
import java.util.Scanner;
public class TestClass {
//public static void main(String[] args) {
private int day, day2, day3, day4, sum1; // ALWAYS decalre variabeles private when possible
Scanner calendar;
public void TestClass(){
calendar = new Scanner(System.in);
}
public void calclulate(){
// System.out.println("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together");
// System.out.println("Enter sum of all four days:");
int sum = calendar.nextInt();
sum1 = sum - 16;
day = sum1 / 4;
// Print to labels or elsewhere
System.out.printf("first day is: ");
System.out.println(day );
day2 = day + 1;
System.out.printf("second day is: ");
System.out.println(day2 );
day3 = day + 7;
System.out.printf("third day is: ");
System.out.println(day3 );
day4 = day + 8;
System.out.printf("forth day is: ");
System.out.println(day4 );
}
public int getDay(){ // Normally "getters" and "setters" are private
return day;
}
}
but here is one class that might help, plus a modifications of your class:-----
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class CalendarPanel extends JPanel {
public void CalendarPanel(){
JLabel instructions = new JLabel("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together" +
"\n Enter sum of all four days ");
JTextField input = new JTextField();
add(input);
TestClass calculations = new TestClass();
calculations.calclulate();
// add metod to get results from calculations object
// and print theese to a graphical object
// for now you could use JLabels
int day = calculations.getDay();
JLabel firstday = new JLabel("Day 1" + day);
add(firstday);
}
}
--------
import java.util.Scanner;
public class TestClass {
//public static void main(String[] args) {
private int day, day2, day3, day4, sum1; // ALWAYS decalre variabeles private when possible
Scanner calendar;
public void TestClass(){
calendar = new Scanner(System.in);
}
public void calclulate(){
// System.out.println("open the calendar built into your computer and select for days in a square like 4 5 11 12 and add them together");
// System.out.println("Enter sum of all four days:");
int sum = calendar.nextInt();
sum1 = sum - 16;
day = sum1 / 4;
// Print to labels or elsewhere
System.out.printf("first day is: ");
System.out.println(day );
day2 = day + 1;
System.out.printf("second day is: ");
System.out.println(day2 );
day3 = day + 7;
System.out.printf("third day is: ");
System.out.println(day3 );
day4 = day + 8;
System.out.printf("forth day is: ");
System.out.println(day4 );
}
public int getDay(){ // Normally "getters" and "setters" are private
return day;
}
}
W
Can i query for only part of data (SQL?)
So, I am making a PIM in C#for an assignment at school, but this bit I cannot wrap my head around how to solve;
I have a database named appointments where I can save text (very basic for now while I experiment)
mysql> explain appointments;
+-------+--------------+------+--
| Field | Type | Null | K
+-------+--------------+------+--
| time | datetime | YES |
| apt | varchar(100) | YES |
| place | varchar(30) | YES |
+-------+--------------+------+--
Now I have made a C# calendar where I click the day of a DateTimeCalendar, and then display a form
I want this form to show the given appointment of the chosen day....
Now as long as I ignore the hours, mins and seconds while saving the info this works fine,
(2012-03-05 00:00:00) as the defaults of these values will be 0 when I just click the date in a calendar anyway:
// selecteddate is the date selected from a MonthCalendar ( selecteddate = monthCalendar1.SelectionStart
String sqlDate = selecteddate.Year + "-" + selecteddate.Month + "-" + selecteddate.Day
+ " " + selecteddate.Hour + ":" + selecteddate.Minute + ":" + selecteddate.Second; //
// will result in the string: 05.03.2012 00:00:00
String start = "SELECT * FROM appointments ";
String condition = "WHERE time = '" + selecteddate + "'";
so if I have this already saved in my DB, and no set "clock" time, I can use a select ... where and retrive it, no problem
But, what if I now had saved a hour and minute value on each row?
How can I make my program still retrieve the datarow matching the selected day, month and year,
but ignore the fact that the data is stored with varying values for hour, min, sec?
(like: "get data from row matching 2012 March 3rd, ANY hour of day" ?)
So, I am making a PIM in C#for an assignment at school, but this bit I cannot wrap my head around how to solve;
I have a database named appointments where I can save text (very basic for now while I experiment)
mysql> explain appointments;
+-------+--------------+------+--
| Field | Type | Null | K
+-------+--------------+------+--
| time | datetime | YES |
| apt | varchar(100) | YES |
| place | varchar(30) | YES |
+-------+--------------+------+--
Now I have made a C# calendar where I click the day of a DateTimeCalendar, and then display a form
I want this form to show the given appointment of the chosen day....
Now as long as I ignore the hours, mins and seconds while saving the info this works fine,
(2012-03-05 00:00:00) as the defaults of these values will be 0 when I just click the date in a calendar anyway:
// selecteddate is the date selected from a MonthCalendar ( selecteddate = monthCalendar1.SelectionStart
String sqlDate = selecteddate.Year + "-" + selecteddate.Month + "-" + selecteddate.Day
+ " " + selecteddate.Hour + ":" + selecteddate.Minute + ":" + selecteddate.Second; //
// will result in the string: 05.03.2012 00:00:00
String start = "SELECT * FROM appointments ";
String condition = "WHERE time = '" + selecteddate + "'";
so if I have this already saved in my DB, and no set "clock" time, I can use a select ... where and retrive it, no problem
But, what if I now had saved a hour and minute value on each row?
How can I make my program still retrieve the datarow matching the selected day, month and year,
but ignore the fact that the data is stored with varying values for hour, min, sec?
(like: "get data from row matching 2012 March 3rd, ANY hour of day" ?)
W
My current code ignores the time (hours, mins, secs)
String sql = "SELECT DATE_FORMAT(time, '%Y/%m/%d') AS time, apt, place FROM appointments WHERE time LIKE " + "\"" + querydate + "%" + "\"";
But it does not retrive the time either (so it outputs 2012/03/10)
Can i make it retrieve the hours and mins too, but still get me ALL results for the given date (so that I dont have to ask for every possible combination of hours)... ?
I want it to output 2012/03/10 21:30
String sql = "SELECT DATE_FORMAT(time, '%Y/%m/%d') AS time, apt, place FROM appointments WHERE time LIKE " + "\"" + querydate + "%" + "\"";
But it does not retrive the time either (so it outputs 2012/03/10)
Can i make it retrieve the hours and mins too, but still get me ALL results for the given date (so that I dont have to ask for every possible combination of hours)... ?
I want it to output 2012/03/10 21:30
W
OK, changed that stuff
New questoion, I want to validate my xml file. The xml file itself contains a schema, made by the dataset.savexml method
How do I do this?..... (I want to detect if the file has been corrupted/ elements are missing. Later I also need to be able to change element names,
but for now I just want to be able to make sure the file is OK)
I have tried a few methods, but one seem to give validation errors even after fix the part of the code, and one claims every element is wrong...
// returns null exception error when I remove part of code in xml, but keeps throwing it when I put that bit back in
try
{ ds.ReadXml("testCalendarAppontments.xml", XmlReadMode.ReadSchema); }
catch (Exception e)
{MessageBox.Show("Feil ved lesing / Validering av XML" +e);
}
// claims everything is wrong
FileStream stream = new FileStream("testCalendarAppontments.xml", FileMode.Open);
XmlValidatingReader vr = new XmlValidatingReader(stream, XmlNodeType.Element, null);
vr.ValidationType = ValidationType.Schema;
vr.ValidationEventHandler += new ValidationEventHandler(ValidationHandler);
while (vr.Read()) ;
Console.WriteLine("Validation finished: {0} validation errors", _ValidationErrorsCount);
public static void ValidationHandler(object sender, ValidationEventArgs args)
{
Console.WriteLine("***Validation error");
Console.WriteLine("\tSeverity:{0}", args.Severity);
Console.WriteLine("\tMessage :{0}", args.Message);
_ValidationErrorsCount++;
}
//====
Message :Could not find schema information for the element 'avtaler'.
Validation error
Severity:Error
Message :The 'PIMappointments' element is not declared.
//=== same error is given for all my elements even if they have not been altered
... I should point out: The ONLY thing I know about schema and validation is that it is used to determine how the structure of a xml file should do, and thus give a message if the xml part does not match what described in the schema. I do not know how to use it properly.
New questoion, I want to validate my xml file. The xml file itself contains a schema, made by the dataset.savexml method
How do I do this?..... (I want to detect if the file has been corrupted/ elements are missing. Later I also need to be able to change element names,
but for now I just want to be able to make sure the file is OK)
I have tried a few methods, but one seem to give validation errors even after fix the part of the code, and one claims every element is wrong...
// returns null exception error when I remove part of code in xml, but keeps throwing it when I put that bit back in
try
{ ds.ReadXml("testCalendarAppontments.xml", XmlReadMode.ReadSchema); }
catch (Exception e)
{MessageBox.Show("Feil ved lesing / Validering av XML" +e);
}
// claims everything is wrong
FileStream stream = new FileStream("testCalendarAppontments.xml", FileMode.Open);
XmlValidatingReader vr = new XmlValidatingReader(stream, XmlNodeType.Element, null);
vr.ValidationType = ValidationType.Schema;
vr.ValidationEventHandler += new ValidationEventHandler(ValidationHandler);
while (vr.Read()) ;
Console.WriteLine("Validation finished: {0} validation errors", _ValidationErrorsCount);
public static void ValidationHandler(object sender, ValidationEventArgs args)
{
Console.WriteLine("***Validation error");
Console.WriteLine("\tSeverity:{0}", args.Severity);
Console.WriteLine("\tMessage :{0}", args.Message);
_ValidationErrorsCount++;
}
//====
Message :Could not find schema information for the element 'avtaler'.
Validation error
Severity:Error
Message :The 'PIMappointments' element is not declared.
//=== same error is given for all my elements even if they have not been altered
... I should point out: The ONLY thing I know about schema and validation is that it is used to determine how the structure of a xml file should do, and thus give a message if the xml part does not match what described in the schema. I do not know how to use it properly.
W
Tech question. Despite of my edcuation, I know nothing about the tech part of computers.
- I realize this kind of stuff is difficult to answer from a distance, but here goes:
We have an old computer standing in my parents house that we are unable to make work.
When we try to boot, it goes through the list trying the onboard sata, CD-- ROM , floppy etc, failing on each.
(Primary hard disk drive 1 failure, floppy drive failure, no boot device available...)
When I entered the BIOS and viewed the boot order, the onboard SATA was listed as not present....
in the list of devices there is a Drive 0 and a Drive 2,
in the onboard devices list, there is only soundcard, videocard etc listed. (I do not know if there should be hard drives here though)
Hard drive diagnostics is able to find drive 0, and says "Error" on drive 2.
I tried disabeling drive 2 in BIOS, and booting from utility drive just to see if there was any change
now the "Not present" disappeared from the onboard SATA in the boot order list....
but it still fails to actually boot/ find the drive
From my limited understanding of the physicals parts of the computer, I believe all wires are where they should be (we never removed any between it wokring and not working, so that should not be a problem anyway),
And ideas? (Apart from "scrap it ")
- I realize this kind of stuff is difficult to answer from a distance, but here goes:
We have an old computer standing in my parents house that we are unable to make work.
When we try to boot, it goes through the list trying the onboard sata, CD-- ROM , floppy etc, failing on each.
(Primary hard disk drive 1 failure, floppy drive failure, no boot device available...)
When I entered the BIOS and viewed the boot order, the onboard SATA was listed as not present....
in the list of devices there is a Drive 0 and a Drive 2,
in the onboard devices list, there is only soundcard, videocard etc listed. (I do not know if there should be hard drives here though)
Hard drive diagnostics is able to find drive 0, and says "Error" on drive 2.
I tried disabeling drive 2 in BIOS, and booting from utility drive just to see if there was any change
now the "Not present" disappeared from the onboard SATA in the boot order list....
but it still fails to actually boot/ find the drive
From my limited understanding of the physicals parts of the computer, I believe all wires are where they should be (we never removed any between it wokring and not working, so that should not be a problem anyway),
And ideas? (Apart from "scrap it
")
W
XSL transform
I am attempting to figure out how transforms work. Now I am able to change tag names, but apparently not to loop
(only first element appears in my transformed file). This is probably a real noob question, but I am simply unable to figure out how to fix it
XML original file
<?xml version="1.0" encoding="UTF-8"?>
<dogs dog-count="2">
<dog age="3">
<color>black</color>
<feeling>hungry</feeling>
<name>Puppy</name>
</dog>
<dog age="2">
<color>white</color>
<feeling>full</feeling>
<name>Snow</name>
</dog>
</dogs>
XML result file
<testcolor>
black
</testcolor>
<testname>
Puppy
</testnamer>
<testfeeling>
hungry
</testfeeling>
XSLT used
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xslutput method="text" omit-xml-declaration="yes"/>
<xsl:template match="/">
<xsl:element name="dogs">
<testcolor<xsl:for-each select="dogs/dog/color"/>>
<xsl:element name="MyDogs"><xsl:value-of select="dogs/dog/color"/>
</testcolor<xsl:for-each select="dogs/dog/color"/>>
<testname<xsl:for-each select="dogs/dog/name"/>>
<xsl:element name="MyDogs"><xsl:value-of select="dogs/dog/name"/>
</testnamer<xsl:for-each select="dogs/dog/name"/>>
<testfeeling<xsl:for-each select="dogs/dog/feeling"/>>
<xsl:element name="MyDogs"><xsl:value-of select="dogs/dog/feeling"/>
</testfeeling<xsl:for-each select="dogs/dog/feeling"/>>
</xsl:element>
</xsl:element>
</xsl:element>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
I am attempting to figure out how transforms work. Now I am able to change tag names, but apparently not to loop
(only first element appears in my transformed file). This is probably a real noob question, but I am simply unable to figure out how to fix it
XML original file
<?xml version="1.0" encoding="UTF-8"?>
<dogs dog-count="2">
<dog age="3">
<color>black</color>
<feeling>hungry</feeling>
<name>Puppy</name>
</dog>
<dog age="2">
<color>white</color>
<feeling>full</feeling>
<name>Snow</name>
</dog>
</dogs>
XML result file
<testcolor>
black
</testcolor>
<testname>
Puppy
</testnamer>
<testfeeling>
hungry
</testfeeling>
XSLT used
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl
utput method="text" omit-xml-declaration="yes"/><xsl:template match="/">
<xsl:element name="dogs">
<testcolor<xsl:for-each select="dogs/dog/color"/>>
<xsl:element name="MyDogs"><xsl:value-of select="dogs/dog/color"/>
</testcolor<xsl:for-each select="dogs/dog/color"/>>
<testname<xsl:for-each select="dogs/dog/name"/>>
<xsl:element name="MyDogs"><xsl:value-of select="dogs/dog/name"/>
</testnamer<xsl:for-each select="dogs/dog/name"/>>
<testfeeling<xsl:for-each select="dogs/dog/feeling"/>>
<xsl:element name="MyDogs"><xsl:value-of select="dogs/dog/feeling"/>
</testfeeling<xsl:for-each select="dogs/dog/feeling"/>>
</xsl:element>
</xsl:element>
</xsl:element>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
W
I am trying to refresh my Java skills, and am playing around with simple input from the command - line.
I have a question:
How come surroning a block in "while true" makes me able to return a vale inside the block (in a method returning a int),
but does not complain that I don't have a return under "if this fails"? Shouldn't the metod still expext an int irrelevant of the "while"?
I have a question:
How come surroning a block in "while true" makes me able to return a vale inside the block (in a method returning a int),
but does not complain that I don't have a return under "if this fails"? Shouldn't the metod still expext an int irrelevant of the "while"?
public static int readInt(String ledetekst)
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in) );
while (true)
{
System.out.print(ledetekst + ":");
try
{
return Integer.parseInt(br.readLine().trim() );
}
catch (Exception e)
{
System.out.println("Value must be integer \n");
continue;
}
}
}
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in) );
while (true)
{
System.out.print(ledetekst + ":");
try
{
return Integer.parseInt(br.readLine().trim() );
}
catch (Exception e)
{
System.out.println("Value must be integer \n");
continue;
}
}
}
W
And a ASP question
How do I use a variable (like the i from the for loop) inside the ASP code, as to change the title of my buttons with the corresponding value
<% for (int i =1; i<11; i++){ %>
<asp:ButtonID="Button1"runat="server"Text="x"Width="41px"/>
<%;} %>
I tried using <%i%> because the suggestions online keep saying to do that, but all that does it output the literal signs, not the variable content, and I cannot leave the "" out either, because I am not allowed to use the <%%>
inside that part of the code.
I would also like to change the position somehow, as to make , for instance 10 X 10 buttons.
For some reason I cant figure out how to take my C# /java skills on this into ASP
How do I use a variable (like the i from the for loop) inside the ASP code, as to change the title of my buttons with the corresponding value
<% for (int i =1; i<11; i++){ %>
<asp:ButtonID="Button1"runat="server"Text="x"Width="41px"/>
<%;} %>
I tried using <%i%> because the suggestions online keep saying to do that, but all that does it output the literal signs, not the variable content, and I cannot leave the "" out either, because I am not allowed to use the <%%>
inside that part of the code.
I would also like to change the position somehow, as to make , for instance 10 X 10 buttons.
For some reason I cant figure out how to take my C# /java skills on this into ASP
W
*BUMP*
So I wont have to make a new thread
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I could use some bright mySQl heads. My brain doesn't like being logical
I am making a program vaguely similar to one at work, where we can view info on: Contracts, Machines , Contacts
There can be several contacts for each machine, as we list whoever makes the call. How do I do this in my database?
For now I have tables: Machine (Serial, type, name), Contact (id ++) , Shipto_party (id + company info) , and ownership (mc serial, company id, contract).
where do I place my foreign key to keep track of my contacts?
So I wont have to make a new thread
--------
I could use some bright mySQl heads. My brain doesn't like being logical
I am making a program vaguely similar to one at work, where we can view info on: Contracts, Machines , Contacts
There can be several contacts for each machine, as we list whoever makes the call. How do I do this in my database?
For now I have tables: Machine (Serial, type, name), Contact (id ++) , Shipto_party (id + company info) , and ownership (mc serial, company id, contract).
where do I place my foreign key to keep track of my contacts?