Question

有人可以给我一些例子来进行查询，其中包含多个WHERE语句吗？

我有以下查询，我想添加WHERE privacy ='public'

$query = $this->db->query("SELECT DATE_FORMAT(eventDate,'%d') AS 
day,eventContent,eventTitle,id FROM eventcal WHERE eventDate BETWEEN 
'$current_year/$current_month/01' AND '$current_year/$current_month
/$total_days_of_current_month'");

提前致谢。

Answer 1

[..] WHERE privacy = 'public' AND (eventDate BETWEEN [..] )？

Answer 2

使用：

AND privacy = 'public'

Answer 3

我对MySql一无所知，但看起来你只需要另一个AND语句：

$ query = $ this-＆gt; db-＆gt; query（“SELECT DATE_FORMAT（eventDate，'％d'）AS day，eventContent，eventTitle，id FROM eventcal WHERE
eventDate BETWEEN'$ current_year / $ current_month / 01'
AND'$ current_year / $ current_month / $ total_days_of_current_month'
AND privacy ='public'“）;

Answer 4

将WHERE更改为AND：

AND privacy = 'public'

完整，并且更具可读性：

SELECT DATE_FORMAT(eventDate,'%d') AS day,
       eventContent,
       eventTitle,
       id
FROM   eventcal
WHERE  eventDate BETWEEN '$current_year/$current_month/01'
                     AND '$current_year/$current_month/$total_days_of_current_month'
AND    privacy = 'public'

如何在MySQL中添加多个WHERE语句？

4 个答案: