Question

我为学生时间表打印输出创建了这个连接语句，我是sql和php的新手，无法弄清楚我做错了什么。如果有人可以提供帮助我会非常感激..提前感谢...（如果这是一个非常基本的问题，我很抱歉）......

mysql_select_db($database_newconn, $newconn);
$query_Recordset1 = "SELECT a.student_id AS "Student ID", f.name AS "Course Name", g.name AS "Lesson Name", g.date AS "Lesson Date", g.start_time AS "Lesson Start Time", g.end_time AS "Lesson End Time", CONCAT( h.first_name,' ', h.last_name) AS "Lesson Tutor" FROM student_table a JOIN enrollement_schedule_table b ON(a.id = b.student_id) JOIN course_table f ON(f.id = b.course_id) JOIN student_attendance_slot_table c ON(c.student_id = a.id) JOIN lesson_table g ON(g.id = c.lesson_id) JOIN tutor_table d ON(d.id = g.tutor_id) JOIN staff_table h ON(h.id = d.staff_id)";
$Recordset1 = mysql_query($query_Recordset1, $newconn) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);

Answer 1

您有引用问题。删除列别名周围的引号并使用刻度

$query_Recordset1 = "
    SELECT a.student_id AS `Student ID`, 
        f.name AS `Course Name`, 
        g.name AS `Lesson Name`, 
        g.date AS `Lesson Date`, 
        g.start_time AS `Lesson Start Time`, 
        g.end_time AS `Lesson End Time`, 
        CONCAT( h.first_name,' ', h.last_name) AS `Lesson Tutor` 
        FROM student_table a 
        JOIN enrollement_schedule_table b ON(a.id = b.student_id) 
        JOIN course_table f ON(f.id = b.course_id) 
        JOIN student_attendance_slot_table c ON(c.student_id = a.id) 
        JOIN lesson_table g ON(g.id = c.lesson_id) 
        JOIN tutor_table d ON(d.id = g.tutor_id) 
        JOIN staff_table h ON(h.id = d.staff_id)";

Answer 2

您需要对查询中的字段使用反向刻度而不是双引号。检查一下：

SELECT 
a.student_id AS `Student ID`
, f.name AS `Course Name`
, g.name AS `Lesson Name`
, g.date AS `Lesson Date`
, g.start_time AS `Lesson Start Time`
, g.end_time AS `Lesson End Time`
, CONCAT(h.first_name, ' ', h.last_name) AS `Lesson Tutor` 
FROM
student_table a 
JOIN enrollement_schedule_table b 
ON (a.id = b.student_id) 
JOIN course_table f 
ON (f.id = b.course_id) 
JOIN student_attendance_slot_table c 
ON (c.student_id = a.id) 
JOIN lesson_table g 
ON (g.id = c.lesson_id) 
JOIN tutor_table d 
ON (d.id = g.tutor_id) 
JOIN staff_table h 
ON (h.id = d.staff_id) ;

MYSQL语句无法弄清楚什么是错误的

2 个答案: