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export mysql fields

Posted on 2007-04-07
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Last Modified: 2013-12-12
I have an sql query that I would like to export as an csv file.

The sql query is as follows.

SELECT companyname from table1

how do I do this. Note: the table has more than just the company field.

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Question by:Cheryl Lander
6 Comments
 
LVL 14

Expert Comment

by:trigger-happy
ID: 18871695
Well, the ideal thing to do would be to create a loop that iterates over all the elements in the sql array. For each element, you append a comma to it and put it into a var.

So assuming you have $result as the data returned from mysql_query();

$temp = ""
while($row = mysql_fetch_row($result)){
     $temp = $temp . $row[0] . ", ";
}

The dot is used to append strings.

--trigger-happy
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LVL 37

Expert Comment

by:momi_sabag
ID: 18871701
if you are only exporting one field why do you mean by csv ?
you won't have commans in the files since there is onliy one field
why don't you just redirect the output to a file ?
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LVL 14

Expert Comment

by:trigger-happy
ID: 18871721
I believe he wants to create a csv file of all the entries in the database table under the companyname field. Well, that's what i assume anyway.

--trigger-happy
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Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 18871842
here some short code to create a tab-delimited output, you only need to add at the end few lines of code to write the variable $output to a file.
if you want to save also the column names as first line, you just have to add a if ($row_number ==1) in the foreach, and feed a $column_names variable (which you have then to write later in the file first)



$sql =" SELECT * from table1";
$output = "";

if ($rows = mysql_query($sql))
{
  $row_number = 0;
  while (?row = mysql_fetch_assoc($rows))
  {
    $row_number++;
    foreach ( $row as ?field_name => $field_value)  
    {
       $output .= $field_value . "\t";
    }
    $output .= "\n";
  }
}

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LVL 50

Expert Comment

by:Steve Bink
ID: 18872499
Those will work for PHP.  To do it through MySQL, try this:


SELECT companyname INTO OUTFILE '/path/to/csvfile'
  FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
  LINES TERMINATED BY '\n'
  FROM table1;

http://dev.mysql.com/doc/refman/5.0/en/select.html
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LVL 14

Expert Comment

by:ygoutham
ID: 18874540
select into outfile syntax returns a error if the target file pre-exists.  so be careful to remove the file once you have exported data to it.  best option would be to safely move it to a temporary folder.
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