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以下は、2 つの関連するテーブルです。

CREATE TABLE SCHOOL
(School_ID char(3), School_Name char(15), School_Address char(15), School_City char(15), School_State char(2), School_Zip char(5), School_Type char(15));
CREATE TABLE STUDENT
(School_ID char(3), St_LastName char(15), St_FirstName char(15), St_DOB char(15), St_SS# char(15), St_Address char(15),St_City char(15), St_State char(2),st_Zip char(5), st_phone char(15));

Access でクエリを作成しようとしました: Display school id with most students しかし、私のクエリでは、occurrences ではなく、最大の School_ID を持つ学生名が表示されます。助けてください

クエリは次のとおりです。

SELECT STUDENT.School_ID, SCHOOL.School_Name, STUDENT.St_LastName, STUDENT.St_FirstName
FROM (SELECT MAX(STUDENT.School_ID) as max
FROM SCHOOL INNER JOIN STUDENT ON (SCHOOL.School_ID = STUDENT.School_ID) AND (SCHOOL.School_ID = STUDENT.School_ID)
)  AS Overallcount, SCHOOL INNER JOIN STUDENT ON (SCHOOL.School_ID = STUDENT.School_ID) AND (SCHOOL.School_ID = STUDENT.School_ID)
WHERE (((STUDENT.School_ID)=([Overallcount].[max])));
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1 に答える 1

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最も簡単な方法は、集計を行い、 and を使用することtopですorder by。

select top   1    school_id
from student
group by school_id
order by COUNT(*) desc
于 2013-03-20T13:53:33.140 に答える