mysql - 在返回的数据集中创建自定义值/列

Question

我遇到过这样的情况:使用 UNION:

$query = "SELECT bigimage, heading, fullarticle, dateadded FROM news ";
$query .= "WHERE (state = '" . $USER->state . "' OR state = 'ALL') AND status = 1 AND newstype != 1 AND frontpage = 1 AND bigimage > '' ";
$query .= "UNION ";
$query .= "SELECT image, eventname, details, dateadded FROM events ";
$query .= "WHERE (state = '" . $USER->state . "' OR state = 'ALL') AND status = 1 AND frontpage = 1 AND image > '' ";
$query .= "ORDER BY dateadded DESC LIMIT 10";
$restresult = mysql_query($query);

现在，我想知道每个结果来自哪个表，所以我想知道是否可以向返回的每个结果添加某种自定义结果，以某种形式指示它来自哪个表。

我可以在返回的结果中添加一个额外的“动态”列吗？

Answer 1

试试这个:

$query = "SELECT bigimage, heading, fullarticle, dateadded, 'news' as TableName FROM news ";
$query .= "WHERE (state = '" . $USER->state . "' OR state = 'ALL') AND status = 1 AND newstype != 1 AND frontpage = 1 AND bigimage > '' ";
$query .= "UNION ";
$query .= "SELECT image, eventname, details, dateadded, 'event' FROM events ";
$query .= "WHERE (state = '" . $USER->state . "' OR state = 'ALL') AND status = 1 AND frontpage = 1 AND image > '' ";
$query .= "ORDER BY dateadded DESC LIMIT 10";
$restresult = mysql_query($query);