group by的SQL语句

distinct a.[ProjectID], a.[ProjectName] from projecttable as a

得出的结果为

其实想要的数据，只是不同的ProjectID所对应的ProjectName

 

 

修改sql语句为

select 
distinct 
a.[ProjectID],
a.[ProjectName] 
from 
projecttable as a
group by a.[ProjectID]

 

group by的SQL语句

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