错误更新记录您的SQL语法有错误

Question

我尝试更新表格，但出现此错误，请帮助我

INSERT INTO TBL_Attendance (columnName) VALUES (v1, v2...etc)
    SELECT columnName 
    FROM TBL_Students 
    WHERE column = 'value'

Answer 1

您需要将SQL查询视为字符串，并相应地连接变量：

"UPDATE posts SET title = '".$title."', content = '".$content."', date = '".$date."' , likes = '".$likes."', groups = '".$groups."' WHERE id = '".$id."'";

Answer 2

您的where子句有2个等号。将其更改为单个等号...而且，date是保留字，因此您需要将其包装在反引号中。

$sqlCommand = "UPDATE posts
    SET title = '$title'     , 
         content = '$content',
        `date`   = '$date'   , 
         groups  = '$groups' 
    WHERE id = 1";