Inner join - SQL Server

Question

I used Northwind database and test with following query :

SELECT *
  FROM products
  JOIN suppliers ON suppliers.supplierID = products.supplierID

and I got a red message like this :

Msg 4104, Level 16, State 1, Line 1
The multi-part identifier "products.supplierID" could not be bound.

Can anyone shed some light ? many thanks,

Answer 1

SELECT suppliers.supplierID,products.supplierID
  FROM products
  JOIN suppliers ON suppliers.supplierID = products.supplierID

You should have to explicitly say which supplierid you need to display in results..put the columns on conflict (mandatory) on select statement

Answer 2

My only guess based on this error and your query is that there is no SupplierId in the Products table. I would check the schema first.

Answer 3

I've just run the nortwind db script and ran the query and it runs fine for me.

SELECT *
FROM products
INNER JOIN suppliers ON suppliers.supplierID = products.supplierID

Have a look at the products table, is the supplierId there? if so then make sure you are running your query against the right database.

can you run the below queries and are they running successfully? The third query is essentially a join in another way.

select SupplierID from Suppliers
go
select SupplierID from Products
go
select * from Products p , Suppliers s
where p.SupplierID = s.SupplierID

Answer 4

your code is creating amibiguity in selecting the columns in select list by "select * " it is not getting which table columsn need to be selected as there are two tables used after from clause..do one thing aliase tables and use aliased column names in select list instead of simple *

eg.

select a.* from test a inner join xyz b on a.id=b.id

Answer 5

Instead Of SELECT * Write the appropriate columns you want to select from both table

like SELECT suppliers.supplierID,suppliers.name..etc

both tables contain supplierID that is why the error comes.

Answer 6

检查数据库的排序规则设置，如果区分大小写，请检查是否正在使用区分大小写的数据对象名称。