SQL 过滤null 值
Select a.NClassId,b.NClassName From p_MarketActionLimit as a left join p_NClass as b on a.NClassId = b.NClassID where a.MarketId = @MarketId and b.NClassName is not null group by a.NClassId,b.NClassName
列 is not null
Select a.NClassId,b.NClassName From p_MarketActionLimit as a left join p_NClass as b on a.NClassId = b.NClassID where a.MarketId = @MarketId and b.NClassName is not null group by a.NClassId,b.NClassName
列 is not null
