从MySQL获取记录

我有2个表格：progress和student。 progress具有字段semester，idStudent，hasFirstAttestation和hasSecondAttestation。我需要从progress那些idStudent哪些学生的最长学期和两个认证= 0。这里是我的查询的例子，但它不工作：从MySQL获取记录

SELECT progress.idStudent FROM monitoring.progress 
WHERE hasFirstAttestation = 0 AND hasSecondAttestation = 0 
AND semester = 
    (SELECT MAX(`semester`) 
     FROM monitoring.progress WHERE progress.idStudent = student.idStudent);

来源

2013-06-12 Eugene

*** **什么*在您的查询中不起作用？ – Kermit

用“IN”取代最后一个“AND” – FredTheWebGuy

删除Max中的''这是MAX（学期）不是MAX（'学期'） –

我想你忘了提及连接表在FROM子句中

SELECT idStudent 
FROM monitoring.progress 
WHERE hasFirstAttestation = 0 AND hasSecondAttestation = 0 
AND semester = (SELECT MAX(semester) FROM monitoring.progress, monitoring.student 
WHERE progress.idStudent = student.idStudent);

来源

2013-06-12 22:21:04

哦，谢谢你，它有效。 – Eugene

很高兴帮助:-) –

SELECT progress.idstudent 
FROM monitoring.progress 
WHERE hasfirstattestation = 0 
    AND hassecondattestation = 0 
    AND semester = (SELECT Max(`semester`) 
        FROM monitoring.progress,monitoring.student 
        WHERE progress.idstudent = student.idstudent);

来源

2013-06-12 22:26:35 user2480204

从MySQL获取记录

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