34,594
社区成员
发帖
与我相关
我的任务
分享
select a.cName
from table1 a LEFT JOIN table2 b ON a.code=b.code
LEFT JOIN table3 ON a.code=b.code
select a.cName
from table1 a LEFT JOIN table2 b ON a.code=b.code
LEFT JOIN table3 c ON a.code=c.code
select a.cName
from table1 a
LEFT JOIN table2 b ON a.code=b.code
LEFT JOIN table3 c ON a.code=c.code