多表联合查询。 我有4个表,请大家给连下。
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解决时间 2021-11-09 00:58
- 提问者网友:轻浮
- 2021-11-08 04:51
多表联合查询。 我有4个表,请大家给连下。
最佳答案
- 五星知识达人网友:酒醒三更
- 2021-11-08 05:44
student.s#=sc.s#
sc.c# =course.c#
course.t#=teacher.t#追问不成追答你是怎么写的啊?追问select * from student,course,teacher,sc where student.s#=sc.s# ,sc.c# =course.c#,course.t#=teacher.t#
* 号换成项也不对追答select * from student,course,teacher,sc where student.s#=sc.s# and sc.c# =course.c# and course.t#=teacher.t#
sc.c# =course.c#
course.t#=teacher.t#追问不成追答你是怎么写的啊?追问select * from student,course,teacher,sc where student.s#=sc.s# ,sc.c# =course.c#,course.t#=teacher.t#
* 号换成项也不对追答select * from student,course,teacher,sc where student.s#=sc.s# and sc.c# =course.c# and course.t#=teacher.t#
全部回答
- 1楼网友:山君与见山
- 2021-11-08 08:16
- -
- 2楼网友:迷人又混蛋
- 2021-11-08 07:13
看着也不怎么乱啊,你这还练不上。。。追问请指教,加分!
- 3楼网友:往事隔山水
- 2021-11-08 06:40
select * from student A join sc B on A.s# = B.s#
join course C on B.c# = C.c#
join teacher D on C.t# = D.t#
join course C on B.c# = C.c#
join teacher D on C.t# = D.t#
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