我有一个mysql查询会抛出一个我猜的错误,因为我明智地使用了“NOT IN”这句话:
$sqlGetCountry = mysqli_query($link, "SELECT * FROM locations WHERE country='$country' AND CURTIME() > time AND '$state' NOT IN state ORDER BY time desc LIMIT 20");
$sqlNumCountry = mysqli_num_rows($sqlGetCountry);
我有一个包含城市,州和国家的表格,我基本上试图找到一个给定状态(在这种情况下为$ state,可能是德克萨斯州,夏威夷等)的查询不在结果中。我收到错误:
mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given
有人有线索吗?
答案 0 :(得分:2)
您无法将表传递给in
,但您可以传递子查询:
SELECT *
FROM locations
WHERE country='$country'
AND CURTIME() > time
AND '$state' NOT IN (select state from state)
ORDER BY
time desc
LIMIT 20