如何使用PHP和MYSQL从列中仅检索唯一值?

这是表1的内容:

id     value
_____________________
1      Max Power
2      Homer Simpson
3      Max Power
4      Lisa Simpson
5      Lisa Simpson


所以,显然,我想要这些结果:

- Max Power
- Homer Simpson
- Lisa Simpson


但我仍然得到:

- Max Power
- Homer Simpson
- Max Power
- Lisa Simpson
- Lisa Simpson


我尝试过的SQL语句如下:

SELECT DISTINCT value FROM column1




SELECT * FROM column1 GROUP BY value


显然这些应该起作用。因此,这是我的完整SQL语句,以防万一其中有些可疑之处:

    <?php
$dblink = mysql_connect(‘host’, ‘username’, ‘password’) or die( mysql_error() );
mysql_select_db(‘database_name);

$rs = mysql_query('SELECT DISTINCT value FROM table1, $dblink);

while($row = mysql_fetch_array($rs)) {

$rowValue = $row['value'];

$explodeRowValue = (explode("||",$rowValue));

foreach ($explodeRowValue as $value_name) {
  $data[] = array(
            'key' => $value_name,
            'value' => $value_name
        );
}
}
echo json_encode($data);
flush();


那么,你们怎么看?这让我疯狂!

萨尔

最佳答案

尝试这个:

SELECT DISTINCT TRIM(value) FROM table1

10-08 04:53