mysqli_query中的语法错误

Question

$db_query = mysqli_query($link, "Select Name,  BriefDescription, SUM(Runs) as Runs
                                FROM BaseTable
                                WHERE  RunDate >= DATE_ADD(day, -$dataRange, getdate() ) AND RunDate <= getdate() 
                                GROUP BY Name,  BreifDescription");

我收到的错误消息是

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-30, getdate() ) AND RunDate <= getdate() GROU' at line 3

我很困惑我的错误在哪里

Answer 1

$db_query = mysqli_query($link, "Select Name,  BriefDescription, SUM(Runs) as Runs
                                FROM BaseTable
                                WHERE  RunDate >= (CURDATE() - INTERVAL $dataRange day) AND RunDate <= CURDATE()
                                GROUP BY Name,  BreifDescription");

更改为使用CURDATE（）和间隔似乎解决了这个问题。

Answer 2

DATE_ADD只有2个参数，你有3个。

date_add（day，offset）