Mysql reducing number of queries - php

Question

I have 3 columns in table1: book, key and value.
| book | key | value |
------------------------------
| 1 | author | a |
| 1 | editor | b |
| 1 | book | c |
Instead of runnuing three queries
$data = mysql_query("
SELECT * FROM table1 WHERE book = '1' AND key = 'author'
") or die(mysql_error());
while($info = mysql_fetch_array( $data ))
{
$value1 = $info['value'];
}
Then repeat this for editor and book.
$value1 $value2 $value3 are inserted in different places on page
Could I do this with one query?

Answer 1

Yes. If there are no other entries with "book = 1" you just query
SELECT * FROM table1 WHERE book = '1'
If there are more entries you can use this query:
SELECT * FROM table1 WHERE book = '1' AND key IN('author','editor','book')
And then create an assoc array:
while($info = mysqli_fetch_assoc( $data ))
{
$value[$info['key']] = $info['value'];
}
...
echo "the book {$value['book']} was written by {$value['author']}";

Answer 2

for create a $value array you have to use this :
$value[] = $info['value'];
instead of this :
$value1 = $info['value'];
Also you can use this code :
$value[]["key"] = $info['key'];
$value[]["value"] = $info['value'];
And for example you can call first row's value with $value[0]["value"]

Answer 3

If you want the values in a single record try this:
SELECT `t1`.`value` AS `value1`, `t2`.`value` AS `value2`, `t3`.`value` AS `value3`
FROM
`table1` AS `t1` CROSS JOIN
`table1` AS `t2` CROSS JOIN
`table1` AS `t3`
WHERE
(`t1`.`book` = 1) AND (`t1`.`key` = 'author')
AND (`t2`.`book` = 1) AND (`t2`.`key` = 'editor')
AND (`t3`.`book` = 1) AND (`t3`.`key` = 'book');