sql server 2008 - SQL return database name in a query comparing one table across three databases -


i have created query compares 1 table across 3 databases.

my query code is:

select item, description, stocked, product_code, cost_method, cost_type (     select item, description, stocked, product_code, cost_method, cost_type         [arborg_test_app].[dbo].item     union     select item, description, stocked, product_code, cost_method, cost_type          [teulon_test_app].[dbo].item     union     select item, description, stocked, product_code, cost_method, cost_type         [pa_test_app].[dbo].item ) data  group item, description, stocked, product_code, cost_method, cost_type having count(*) = 1

and works great, compares table item across 3 databases , returns rows data in selected columns doesn't match between 3 databases.

my issue is, in results return can't tell row database. query results: enter image description here

what need additional column in query results shows database name each row.

because looking singletons, can add db name each subquery , use max() in outer query:

select item, description, stocked, product_code, cost_method, cost_type,        max(db) thedb (     select item, description, stocked, product_code, cost_method, cost_type, 'arbord' db         [arborg_test_app].[dbo].item     union     select item, description, stocked, product_code, cost_method, cost_type, 'teulon'         [teulon_test_app].[dbo].item     union     select item, description, stocked, product_code, cost_method, cost_type, 'pa'         [pa_test_app].[dbo].item ) data group item, description, stocked, product_code, cost_method, cost_type having count(*) = 1;

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