请参考下列语句:
select B.id,B.name,B.place,A.user_id,A.exam_id A.status
from B left join A on A.id=B.id where A.id in (1,2);
请采用以下脚本:
select a.id,b.name,b.place,a.user_id from a left join b
on a.id = b.id
请测试,并采纳,如有疑问,及时沟通,谢谢!
select A.*,B.* from A left join B on A.id=B.id;