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@@ -1622,7 +1622,7 @@
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SELECT count(sr.id_)
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from student_registration sr LEFT JOIN sys_user u on sr.user_id_ = u.id_
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LEFT JOIN student s on s.user_id_ = sr.user_id_ LEFT JOIN `subject` sub on sub.id_ = sr.actual_subject_id_
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- LEFT JOIN student_instrument si on si.student_id_ = sr.user_id_
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+ LEFT JOIN (select * from student_instrument where id_ in ((select max(id_) from student_instrument group by student_id_))) si on si.student_id_ = sr.user_id_
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WHERE sr.music_group_status_ = 'NORMAL'
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<if test="musicGroupId != null">
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AND sr.music_group_id_ = #{musicGroupId}
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yonge