连接Mysql中重复的表数据 [英] Join table data duplicate in Mysql
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问题描述
我创建了两个表 busbook 和 seats.当我加入两个重复的表数据时，我不知道为什么.
I have created two tables busbook and seats. When I join two tables data duplicated I don't why.
SELECT seats.busno,
seats.seats,
busbook.status,
busbook.customer,
busbook.mobile,
seats.date
FROM seats
Left JOIN busbook ON seats.busno=busbook.busno
这是我得到的输出:
busno seats status customer mobile date
91000 1 Booked ss 11 2019-12-06
91000 2 Booked ss 11 2019-12-06
91000 3 Booked ss 11 2019-12-06
91000 4 Booked ss 11 2019-12-06
91000 5 Booked ss 11 2019-12-06
91000 6 Booked ss 11 2019-12-06
91000 7 Booked ss 11 2019-12-06
91000 8 Booked ss 11 2019-12-06
91000 9 Booked ss 11 2019-12-06
91000 10 Booked ss 11 2019-12-06
座位:
id busno seats date
1 91000 1 2019-12-06
2 91000 2 2019-12-06
3 91000 3 2019-12-06
4 91000 4 2019-12-06
5 91000 5 2019-12-06
6 91000 6 2019-12-06
7 91000 7 2019-12-06
8 91000 8 2019-12-06
9 91000 9 2019-12-06
10 91000 10 2019-12-06
11 91000 11 2019-12-06
12 91000 12 2019-12-06
busbook 表:
id busno seat status customer mobile date
2 91000 1 Booked ss 11 2019-12-06
3 91000 19 Booked dd 22 2019-12-06
推荐答案
怎么样
SELECT seats.busno, seats.seats,busbook.status, busbook.customer,busbook.mobile,seats.date FROM seats
Left JOIN busbook ON seats.busno=busbook.busno
AND seats.seats = busbook.seat
我想这取决于seat.id或seats.seats加入的确切方案
I guess it depends on what exactly scheme is to do join by seats.id or seats.seats
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