数据库中,一张表里面有房间号和老师号,比如:
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解决时间 2021-11-24 06:11
- 提问者网友：疯子也有疯子的情调
- 2021-11-23 05:49
数据库中,一张表里面有房间号和老师号,比如:
最佳答案
- 五星知识达人网友：由着我着迷
- 2021-11-23 07:26
追问
我是想用查询语句得到一个这样的表
追答SELECt roomID,CONCAt(teacher SEPARATOR',') teacher FROM teacher where roomID = ?
你去试试追问
我是想用查询语句得到一个这样的表
追答SELECt roomID,CONCAt(teacher SEPARATOR',') teacher FROM teacher where roomID = ?
你去试试追问
全部回答
- 1楼网友：空山清雨
- 2021-11-23 08:44
INSERT into teacher(roomID, teacher)
VALUES(1, '李老师,张老师')；
首先roomID是整形的，不应该带单引号，其次insert into 而不是insert
VALUES(1, '李老师,张老师')；
首先roomID是整形的，不应该带单引号，其次insert into 而不是insert
- 2楼网友：独钓一江月
- 2021-11-23 07:38
Oracle
select roomID, wm_concat(teacher) teacher
from teacher
group by roomID
Sql Server
select roomID, (stuff((select ',' + teacher from teacher b where b.roomID=a.roomID for xml path('')),1,1,'')) teacher
from teacher a
group by roomID追问mysql能实现吗?
select roomID, wm_concat(teacher) teacher
from teacher
group by roomID
Sql Server
select roomID, (stuff((select ',' + teacher from teacher b where b.roomID=a.roomID for xml path('')),1,1,'')) teacher
from teacher a
group by roomID追问mysql能实现吗?
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