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How can I get a query to only echo rows if it has data

Posted on 2011-02-26
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Last Modified: 2012-05-11
How can i get the query to echo rows only if it has data. in the script below I have it echo the results for lineitem1, but in some case if the table has data for lineitem2 I want to echo it as well but I dont want the results to fill the page with empty rows . How would I tell it to echo only rows with data and not the other.
$unit = $_POST['unit'];
$result = mysql_query("SELECT * FROM workorder WHERE wo_unit='$unit' ORDER BY wo_status, wo_hub DESC;");

echo "<table border='1'>
<tr>
<th>W/O Number</th>
<th>Unit</th>
<th>Date</th>
<th>Hub</th>
<th>Description</th>
<th>Notes</th>
<th>Status</th>

</tr>";

while($row = mysql_fetch_array($result))
  {
  echo "<tr>";
  echo "<td>" . $row['wo_number'] . "</td>";
  echo "<td>" . $row['wo_unit'] . "</td>";
  echo "<td>" . $row['wo_date'] . "</td>";
  echo "<td>" . $row['wo_hub'] . "</td>";
  echo "<td>" . $row['lineitem1'] . "</td>";
  echo "<td>" . $row['notes'] . "</td>";
  echo "<td>" . $row['wo_status'] . "</td>";
  echo "</tr>";
  }
echo "</table>";

mysql_close($con);
?>

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Question by:GD_GRAY
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7 Comments
 
LVL 9

Accepted Solution

by:
sshah254 earned 375 total points
ID: 34988877
On line 3, put a check like this

 if ($result->num_rows > 0) {
}

close it at the appropriate place, I think on line 29.

Ss

 
0
 
LVL 19

Assisted Solution

by:Michael701
Michael701 earned 375 total points
ID: 34988883
this should be working fine. you have WHERE wo_unit='$unit' so if there are 30 records for lineitem1 they will display, and if there are one 3 records for lineitem2 they are the only ones that will display.

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Author Comment

by:GD_GRAY
ID: 34988956
the $unit is to pull all the workorders for that one unit, so if I add the echo lineitem2,3 etc if one work order only has one lineitem and the next has 3 it makes the table extra long with blank spots. Could it be made to put the lineitems on a secound row ? like
workorder number  date  hub  notes
Description   |        |        |      |
workorder number  date  hub  notes
Description   |        |        |      |
workorder number  date  hub  notes
Description   |        |        |      |
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LVL 17

Assisted Solution

by:nanharbison
nanharbison earned 375 total points
ID: 34989125
You could do something like this, where you say $row['lineitem1'] is not blank.
while($row = mysql_fetch_array($result) &&($row['lineitem1'] !=""))

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LVL 17

Expert Comment

by:nanharbison
ID: 34989142
Oh wait, I am not sure you can check what is in the field $row['lineitem1'] at the same time you are getting the results. You might have to make it be another if statement inside the while loop
while($row = mysql_fetch_array($result))
  {
  	if ($row['lineitem1'] !="") {
  		echo "<tr>";
  		echo "<td>" . $row['wo_number'] . "</td>";
  		echo "<td>" . $row['wo_unit'] . "</td>";
  		echo "<td>" . $row['wo_date'] . "</td>";
  		echo "<td>" . $row['wo_hub'] . "</td>";
  		echo "<td>" . $row['lineitem1'] . "</td>";
  		echo "<td>" . $row['notes'] . "</td>";
  		echo "<td>" . $row['wo_status'] . "</td>";
  		echo "</tr>";
  }
}

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LVL 3

Assisted Solution

by:sergiobg57
sergiobg57 earned 375 total points
ID: 34989327
SELECT * FROM workorder WHERE wo_unit='$unit'  and len(wo_unit) > 0 ORDER BY wo_status, wo_hub DESC

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Author Closing Comment

by:GD_GRAY
ID: 35216636
I was never able to get any of this to work. but thanks for your help.
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