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제목 mysql 일련번호구하기 (serial number)
등록일 2016.06.15 HIT 2061 작성자 폰돌
SELECT  @s:=@s+1 serial_number,student_id,student_name,student_avg
FROM    students,
        (SELECT @s:= 0) AS s
WHERE
student_avg > 4;
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