How to combine 2 the same tables from 2 different databases

Question

We have made 2 databases company1 and company2
Both databases contains the same tables
Now we want to make a report with server reporting services. The report must give us information from the 2 databases.
We use the following query:
SELECT     '501'as divisie, GRV_DebtorOutstanding2.[Debtor code] AS Debiteur, GRV_DebtorOutstanding2.cmp_name AS Naam, SUM(GRV_DebtorOutstanding2.[Outstanding Amount]) AS Saldo,
                      GRV_DebtorOutstanding2.blokkade, GRV_Debtors.City
FROM         [501].dbo.GRV_DebtorOutstanding2 INNER JOIN
                      [501].dbo.GRV_Debtors ON GRV_DebtorOutstanding2.[Debtor code] = GRV_Debtors.[Debtor code]
WHERE     (GRV_DebtorOutstanding2.blokkade = 'B')
GROUP BY GRV_DebtorOutstanding2.[Debtor code], GRV_DebtorOutstanding2.cmp_name, GRV_DebtorOutstanding2.blokkade, GRV_Debtors.City
ORDER BY Debiteur
when we use the same query to select the data of the other database in the same query it doesn't work. I have tried it with the command Union All
But it crashes,
please help, to fix it

Answer 1

Hi Robert,
According to your description, you have created two same databases. When you run the same query for the second database, it doesn’t work.
In your scenario, since databases are the same and the query for first database can work fine, it should also work when query the second database using the same query. When you create second dataset, please check if you have used a correct datasource
which is second database. Then try to run the query again. If issue persists, please share the error message around the time when you query the second database.
If you have any question, please feel free to ask.
Best regards,
Qiuyun Yu
Qiuyun Yu
TechNet Community Support