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Editorial Team
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Asked: 2026-05-13T10:07:48+00:00

When I try this: SELECT * — INTO DB2.dbo.CustomerOrderLines FROM DB1.dbo.CustomerOrderLines INNER JOIN DB1.dbo.CustomerOrders

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When I try this:

SELECT * 
-- INTO DB2.dbo.CustomerOrderLines
FROM DB1.dbo.CustomerOrderLines 
INNER JOIN DB1.dbo.CustomerOrders ON DB1.dbo.CustomerOrders.Order_Display_Ref = DB1.dbo.CustomerOrderLines.Order_Display_Ref
WHERE DB1.dbo.CustomerOrders.Delivered_Date BETWEEN '2009-09-23' and '2009-09-24'

it show the rows correctly.

When I try to copy the contents from one table in DB1 into the same table in DB2 (and create it if it does not exist):

SELECT * 
INTO DB2.dbo.CustomerOrderLines
FROM DB1.dbo.CustomerOrderLines 
INNER JOIN DB1.dbo.CustomerOrders ON DB1.dbo.CustomerOrders.Order_Display_Ref = DB1.dbo.CustomerOrderLines.Order_Display_Ref
WHERE DB1.dbo.CustomerOrders.Delivered_Date BETWEEN '2009-09-23' and '2009-09-24'

it fails with

Msg 2705, Level 16, State 3, Line 1
Column names in each table must be unique. Column name ‘Order_Display_Ref’ in table ‘CustomerOrderLines’ is specified more than once.

SELECT * INTO and INSERT INTO SELECT * work fine when copying other tables from one database into another, but they do not use JOINS.

What is my mistake?

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1 Answer

  1. Editorial Team

    You want to add the content of the DB1.dbo.CustomerOrderLines to DB2.dbo.CustomerOrderLines?

    Then, tell SQL Server in your SELECT that you want only the content of this table.

    SELECT DB1.dbo.CustomerOrderLines.* 
INTO DB2.dbo.CustomerOrderLines
FROM DB1.dbo.CustomerOrderLines 
INNER JOIN DB1.dbo.CustomerOrders ON DB1.dbo.CustomerOrders.Order_Display_Ref = DB1.dbo.CustomerOrderLines.Order_Display_Ref
WHERE DB1.dbo.CustomerOrders.Delivered_Date BETWEEN '2009-09-23' and '2009-09-24'
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