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Editorial Team
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Asked: 2026-06-01T14:34:32+00:00

I’m having trouble using variables in my SQL WHERE clause. I’m getting this error:

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I’m having trouble using variables in my SQL WHERE clause. I’m getting this error:

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL
result resource

The code is:

$sql3= mysql_query("SELECT COUNT($ww) FROM data WHERE $".$ww." =  ".$weeknumber." ");

What am I doing wrong?

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1 Answer

  1. Editorial Team

    Why don’t you count the table column by putting the columns name in your COUNT(column_name)?

    Like so:

    $sql3= mysql_query("SELECT COUNT(week_num) as wknum FROM data WHERE '$ww' =  '$weeknumber'"); 
$counted_weeks["week_num"]

// $counted_weeks["week_num"] will output your sum
//week_num would be a column name from your "data" table
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