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[英]How I do aysnchronously display the results of an SQL query (with ajax)?
[英]How do I use the results of a SQL query in a subsequent query?
我想在后续查询的where
语句中使用查询的结果集。 遇到问题是因为第一个查询返回了多个结果,并且我不知道如何将这些结果转换为逗号分隔的字符串以用于'IN' ()
语句。
$Result1 = mysql_query ("
select id from Table1
where
upper('$Input') = Employee_number
")
or die(mysql_error());
$Result2 = mysql_query ("
Select * from table2 where ID in ($Result1)")
您可以将其合并为单个MySQL语句,如下所示:
SELECT * FROM Table2 WHERE id IN
(SELECT id FROM Table1 where upper('$Input') = Employee_number);
但是,如果您真的想像问题中那样进行操作,则可能必须查找如何使用mysql_query
的结果,只需在函数引用中查找即可。
$query1 = mysql_query("
select id from Table1
where upper('$Input') = Employee_number
") or die(mysql_error());
$ids = array();
while($Result1 = mysql_fetch_array($query1))
{
$ids[] = $Result1['id'];
}
if(sizeof($ids))
{
$n_ids = implode(',', $ids);
$query2 = mysql_query("
select * from Table2
where ID IN (" . $n_ids . ")
") or die(mysql_error());
}
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