php - 如何使用 php 和 mysql 执行多个 AND 运算符和 OR 运算符？

Question

第一个查询有效并显示正确的结果。当我添加额外的 AND 条件时，出现“尝试获取非对象的属性”错误。

我可以通过一个 OR 和另一个条件成功执行。

这是回显的查询:

SELECT * FROM scores 
WHERE (sortDate <= 20190629 AND sport = football) 
       AND (homeID = 4 OR awayID = 4) 
ORDER BY gameDate DESC

我确定变量正在传递。

这个效果很好:

$sql = "SELECT * FROM scores 
WHERE sortDate <= $today
AND (homeID = $teamID OR awayID = $teamID)
ORDER BY gameDate DESC";

此错误(添加 AND):

$sql = "SELECT * FROM scores 
WHERE (sortDate <= $today AND sport = $sportID)
AND (homeID = $teamID OR awayID = $teamID)
ORDER BY gameDate DESC";

Answer 1

试试这个

$sql = "SELECT * FROM scores 
WHERE (sortDate <= $today AND sport = '$sportID')
AND (homeID = $teamID OR awayID = $teamID)
ORDER BY gameDate DESC";

或

$sql = "SELECT * FROM scores 
WHERE (sortDate <= $today) AND (sport = $sportID)
AND (homeID = $teamID OR awayID = $teamID)
ORDER BY gameDate DESC";