sql live out items from another table
I'm putting together a league script. When someone registers for a league they choose from a list of available teams in a drop down field.
The problem i'm having is that I'm getting this error message when there are more than one fields.
"Subquery returns more than 1 row"
here's the script:
//List available teams
$query_chamoline = "SELECT * FROM MLB WHERE `team`<>(SELECT `team` FROM leaguemembers WHERE `leagueid`=\"$lid\" AND `active`='Y') ORDER BY `team` ASC";
$chamoline = mysql_query($query_chamoline) or die(mysql_error());
$row_chamoline = mysql_fetch_assoc($chamoline);
$totalRows_chamoline = mysql_num_rows($chamoline);
<select id="team">
<option valu开发者_JS百科e="">Select Available Team</option>
<?php do { ?>
<?php
$tname=$row_chamoline['team'];
if($totalRows_chamoline>0)
{?>
<option value="<?php echo $tname ?>"><?php echo $tname ?></option><?php }} while ($row_chamoline = mysql_fetch_assoc($chamoline)); ?>
</select>
I'm selecting from the total list of teams in the MLB table that doesn't match the teams picked by other members in the leaguemembers table.
change "<>" with "not in (...)"
why? "<>" excepts a single value (ex. 'team' <> 'xxx'), "not in" uses a set logic to handle many items (ex. 'team' not in ('aaa','bbb','ccc'))
Try using NOT IN instead:
$query_chamoline = "SELECT * FROM MLB WHERE `team` NOT IN(SELECT `team` FROM leaguemembers WHERE `leagueid`=\"$lid\" AND `active`='Y') ORDER BY `team` ASC";
This change will stop the error, but not the logic error (if it exists)
$query_chamoline = "SELECT * FROM MLB WHERE `team`<>(SELECT TOP 1 `team` FROM leaguemembers WHERE `leagueid`=\"$lid\" AND `active`='Y') ORDER BY `team` ASC";
looking at his answer I expect Ass3mbler is right.
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