Mysql eal是我遇到困难的部分，因为我不知道如何检查结果。再次感谢！不客气！我建议把这份报告放在手边；负责人和其他管理员通常都在寻找这一点，并且很容易对其可用性留下深刻印象。 SELECT * FROM Students WHERE ID IN ( S

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eal是我遇到困难的部分，因为我不知道如何检查结果。再次感谢！不客气！我建议把这份报告放在手边；负责人和其他管理员通常都在寻找这一点，并且很容易对其可用性留下深刻印象。

SELECT * FROM Students 
WHERE ID IN (
    SELECT studentid FROM ps_adaadm_defaults_all 
    WHERE schoolid IN ('16', '28', '40') 
    AND calendardate >= '1-May-15' 
    AND calendardate <= '31-May-15' 
    GROUP BY studentid)
ORDER BY LastFirst;

SELECT UNIQUE pe.StudentID
FROM ps_enrollment pe
WHERE pe.schoolid IN ('16', '28', '40') 
AND pe.EntryDate <= '05/01/2015' 
AND pe.ExitDate >= '05/30/2015' 

SELECT UNIQUE pe.StudentID
FROM ps_enrollment pe
WHERE pe.schoolid IN ('16', '28', '40') 
AND (
    (pe.EntryDate <= '05/01/2015' AND pe.ExitDate >= '05/01/2015') 
    OR (pe.EntryDate <= '05/30/2015' AND pe.ExitDate >= '05/30/2015') 
    OR (pe.EntryDate >= '05/01/2015' AND pe.ExitDate <= '05/30/2015')
    )