[英]PHP SQL query for WHERE {column} IS NOT NULL returns rows with null in column
I am running this query: 我正在运行此查询:
mysql_query("SELECT * FROM $pid WHERE ff IS NOT NULL ORDER BY time_out");
I am getting a response with some rows that are null in the ff column. 我得到一些响应,其中某些行在ff列中为空。
I verified this later on in the code with: 我稍后在代码中使用以下方法对此进行了验证:
if ($reps[$i]['ff'] == null)
{
$test = "ff is null";
}
else
{
$test = $reps[$i]['ff'];
}
Not sure what I am missing here. 不知道我在这里想念的是什么。 Thanks in advance.
提前致谢。
使用查询
mysql_query("SELECT * FROM $pid WHERE ff IS NOT NULL and $pid != '' ORDER BY time_out");
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