Question

我有一个mastertable id配件CarColor变体值（1 863,862 6 2 5）等（所有id都在我的mastertable中）和另外5个像汽车颜色，变体等有价值的表

id   color
5    red
6    blue
3    green

我需要来自id = mastertable.id的每个子表的值像

SqlCommand sqlCommand = new SqlCommand(" select * from cartable where carcolor.id = mastertable.carcolor ") ; 
SqlCommand sqlCommand = new SqlCommand(" select * from varianttable where variant.id = mastertable.variant ")  ; 
SqlCommand sqlCommand = new SqlCommand ("select * from accessoriestable where accessories.id = mastertable.accessories ") ;//

我的问题是如何将所有5个选择语句连接在一起或者更好的解决方案吗？

Answer 1

我想你需要这个吗？

select * from mastertable
left join carcolortable on mastertable.carcolor=carcolortable.id
left join varianttable on mastertable.variant=varianttable.id
left join accessoriestable on mastertable.accessories=accessoriestable.id

如果您在评论中mastertable.carcolor（和其他人）中描述的Id中包含逗号分隔的varchar列表，那么它应该是：

select * from mastertable
left join carcolortable on 
        ( ','+mastertable.carcolor+',' 
          LIKE 
          '%,'+CAST(carcolortable.id as varchar(100))+',%'
         )
left join varianttable on 
        ( ','+mastertable.variant+',' 
          LIKE 
          '%,'+CAST(varianttable.id as varchar(100))+',%'
         )

left join accessoriestable on 
        ( ','+mastertable.accessories+',' 
          LIKE 
          '%,'+CAST(accessoriestable.id as varchar(100))+',%'
         )

如何将多个select语句连接在一起

1 个答案: