建表语句点击详见
– 查询课程名称为"数学",且分数低于60的学生姓名和分数
SELECT
st
.s_id
,
st
.s_name
,
sc
.s_score
FROM student st
INNER JOIN score sc
ON sc
.s_id
=st
.s_id
AND sc
.s_score
<60
INNER JOIN course c
ON c
.c_id
=sc
.c_id
AND c
.c_name
="数学"
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