Question

select a.studentid, CONCAT(a.firstname,' ',a.middlename,' ',a.lastname) AS studentname, a.birthdate,b.admissiondate,b.status,c.facultyname,d.classname,e.sectionname
from studentpersonalinfo as a, studentacademicinfo as b, faculty as c, class as d, section as e 
WHERE a.studentid=b.studentid AND b.facultyid=c.facultyid AND b.classid=d.classid AND b.sectionid=e.sectionid AND b.status='running' and studentname LIKE '%$name%'  ORDER BY $sort $order limit $offset,$rows

Answer 1

我已将WHERE Condition替换为studentname LIKE '%$name%' CONCAT_WS(' ', a.firstname,a.middlename,a.lastname) LIKE '%$name%'。

CONCAT_WS的一般语法是：

CONCAT_WS (separator, string1, string2,…)

现在它应该有效：

SELECT a.studentid, CONCAT(a.firstname,' ',a.middlename,' ',a.lastname) AS studentname, a.birthdate, b.admissiondate, b.status, c.facultyname, d.classname, e.sectionname 
FROM studentpersonalinfo as a, studentacademicinfo as b, faculty as c, class as d, section as e 
WHERE a.studentid = b.studentid AND b.facultyid = c.facultyid AND b.classid = d.classid AND b.sectionid = e.sectionid AND b.status = 'running' and CONCAT_WS(' ', a.firstname, a.middlename, a.lastname) LIKE '%$name%' ORDER BY $sort $order limit $offset, $rows

它也可以像你一样使用它，只需将CONCAT从SELECT替换为CONCAT_WS(' ', a.firstname, a.middlename, a.lastname) AS studentname

所以一般来说你的代码应该是：

    SELECT a.studentid, CONCAT_WS(' ', a.firstname, a.middlename, a.lastname) AS studentname, a.birthdate, b.admissiondate, b.status, c.facultyname, d.classname, e.sectionname 
    FROM studentpersonalinfo as a, studentacademicinfo as b, faculty as c, class as d, section as e 
    WHERE a.studentid = b.studentid AND b.facultyid = c.facultyid AND b.classid = d.classid AND b.sectionid = e.sectionid AND b.status = 'running' and studentname LIKE '%$name%' ORDER BY $sort $order limit $offset, $rows

现在它应该正常工作......

有关详细信息，请参阅：https://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_concat-ws

学生的名字，中间名，姓氏在学生个人信息的不同领域。我需要通过全名执行搜索操作

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