sql里求得是两张表的一些关联关系:$result1 = @mysql_query("SELECT `dutswitch`.ID, `dutswitch`.CustomerLotID, `dutswitch`.state, `dutswitch`.status1, `dutswitch`.status2 FROM `dutswitch` , `dutbin` WHERE `dutswitch`.CustomerLotID = `dutbin`.CustomerLotID AND `dutswitch`.state = `dutbin`.State AND `dutbin`.ID=$id LIMIT 1");
if (@mysql_num_rows($result1) == 0)
die('Error ID!');输出是'Error ID!'
请问语句里有什么错误?
if (@mysql_num_rows($result1) == 0)
die('Error ID!');输出是'Error ID!'
请问语句里有什么错误?
if( !$result1 )
{
exit
}
if (@mysql_num_rows($result1) == 0)
die('Error ID!');